intel/compiler: Silence unused parameter warnings in release builds

Reduces my build from 7005 warnings to 6451 warnings by silencing 554
instances of

In file included from ../../SOURCE/master/src/intel/compiler/brw_disasm.c:28:0:
../../SOURCE/master/src/intel/compiler/brw_inst.h: In function ‘brw_inst_3src_a1_src0_imm’:
../../SOURCE/master/src/intel/compiler/brw_inst.h:346:57: warning: unused parameter ‘devinfo’ [-Wunused-parameter]
 brw_inst_3src_a1_src0_imm(const struct gen_device_info *devinfo,
                                                         ^~~~~~~
../../SOURCE/master/src/intel/compiler/brw_inst.h: In function ‘brw_inst_3src_a1_src2_imm’:
../../SOURCE/master/src/intel/compiler/brw_inst.h:354:57: warning: unused parameter ‘devinfo’ [-Wunused-parameter]
 brw_inst_3src_a1_src2_imm(const struct gen_device_info *devinfo,
                                                         ^~~~~~~
../../SOURCE/master/src/intel/compiler/brw_inst.h: In function ‘brw_inst_set_3src_a1_src0_imm’:
../../SOURCE/master/src/intel/compiler/brw_inst.h:362:61: warning: unused parameter ‘devinfo’ [-Wunused-parameter]
 brw_inst_set_3src_a1_src0_imm(const struct gen_device_info *devinfo,
                                                             ^~~~~~~
../../SOURCE/master/src/intel/compiler/brw_inst.h: In function ‘brw_inst_set_3src_a1_src2_imm’:
../../SOURCE/master/src/intel/compiler/brw_inst.h:370:61: warning: unused parameter ‘devinfo’ [-Wunused-parameter]
 brw_inst_set_3src_a1_src2_imm(const struct gen_device_info *devinfo,
                                                             ^~~~~~~
../../SOURCE/master/src/intel/compiler/brw_inst.h: In function ‘brw_inst_imm_uq’:
../../SOURCE/master/src/intel/compiler/brw_inst.h:703:47: warning: unused parameter ‘devinfo’ [-Wunused-parameter]
 brw_inst_imm_uq(const struct gen_device_info *devinfo, const brw_inst *insn)
                                               ^~~~~~~
In file included from ../../SOURCE/master/src/intel/compiler/brw_shader.h:29:0,
                 from ../../SOURCE/master/src/intel/compiler/brw_disasm.c:29:
../../SOURCE/master/src/intel/compiler/brw_compiler.h: In function ‘brw_stage_has_packed_dispatch’:
../../SOURCE/master/src/intel/compiler/brw_compiler.h:1277:61: warning: unused parameter ‘devinfo’ [-Wunused-parameter]
 brw_stage_has_packed_dispatch(const struct gen_device_info *devinfo,
                                                             ^~~~~~~
../../SOURCE/master/src/intel/compiler/brw_disasm.c: In function ‘src_ia1’:
../../SOURCE/master/src/intel/compiler/brw_disasm.c:849:18: warning: unused parameter ‘_reg_file’ [-Wunused-parameter]
         unsigned _reg_file,
                  ^~~~~~~~~

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>

src/intel/compiler/brw_compiler.h

@@ -1274,7 +1274,7 @@ encode_slm_size(unsigned gen, uint32_t bytes)
  * '2^n - 1' for some n.
  */
 static inline bool
-brw_stage_has_packed_dispatch(const struct gen_device_info *devinfo,
+brw_stage_has_packed_dispatch(MAYBE_UNUSED const struct gen_device_info *devinfo,
                               gl_shader_stage stage,
                               const struct brw_stage_prog_data *prog_data)
 {

src/intel/compiler/brw_inst.h

@@ -343,7 +343,7 @@ REG_TYPE(src2)
  *  @{
  */
 static inline uint16_t
-brw_inst_3src_a1_src0_imm(const struct gen_device_info *devinfo,
+brw_inst_3src_a1_src0_imm(MAYBE_UNUSED const struct gen_device_info *devinfo,
                           const brw_inst *insn)
 {
    assert(devinfo->gen >= 10);
@@ -351,7 +351,7 @@ brw_inst_3src_a1_src0_imm(const struct gen_device_info *devinfo,
 }
 
 static inline uint16_t
-brw_inst_3src_a1_src2_imm(const struct gen_device_info *devinfo,
+brw_inst_3src_a1_src2_imm(MAYBE_UNUSED const struct gen_device_info *devinfo,
                           const brw_inst *insn)
 {
    assert(devinfo->gen >= 10);
@@ -359,7 +359,7 @@ brw_inst_3src_a1_src2_imm(const struct gen_device_info *devinfo,
 }
 
 static inline void
-brw_inst_set_3src_a1_src0_imm(const struct gen_device_info *devinfo,
+brw_inst_set_3src_a1_src0_imm(MAYBE_UNUSED const struct gen_device_info *devinfo,
                               brw_inst *insn, uint16_t value)
 {
    assert(devinfo->gen >= 10);
@@ -367,7 +367,7 @@ brw_inst_set_3src_a1_src0_imm(const struct gen_device_info *devinfo,
 }
 
 static inline void
-brw_inst_set_3src_a1_src2_imm(const struct gen_device_info *devinfo,
+brw_inst_set_3src_a1_src2_imm(MAYBE_UNUSED const struct gen_device_info *devinfo,
                               brw_inst *insn, uint16_t value)
 {
    assert(devinfo->gen >= 10);
@@ -700,7 +700,8 @@ brw_inst_imm_ud(const struct gen_device_info *devinfo, const brw_inst *insn)
 }
 
 static inline uint64_t
-brw_inst_imm_uq(const struct gen_device_info *devinfo, const brw_inst *insn)
+brw_inst_imm_uq(MAYBE_UNUSED const struct gen_device_info *devinfo,
+                const brw_inst *insn)
 {
    assert(devinfo->gen >= 8);
    return brw_inst_bits(insn, 127, 64);