Revert "i965: Make the miptree clear color setter take a gl_color_union"

This reverts commit 1d94aa1987.

The next patch will make depth miptrees use the clear color setter that
was originally being used for color miptrees. Go back to using the
isl_color_value parameter because it's the same type as the
fast_clear_color field used by color and depth miptrees.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/mesa/drivers/dri/i965/brw_blorp.c

@@ -1225,9 +1225,12 @@ do_single_blorp_clear(struct brw_context *brw, struct gl_framebuffer *fb,
    if (can_fast_clear) {
       const enum isl_aux_state aux_state =
          intel_miptree_get_aux_state(irb->mt, irb->mt_level, irb->mt_layer);
+      union isl_color_value clear_color =
+         brw_meta_convert_fast_clear_color(brw, irb->mt,
+                                           &ctx->Color.ClearColor);
 
       bool same_clear_color =
-         !intel_miptree_set_clear_color(brw, irb->mt, &ctx->Color.ClearColor);
+         !intel_miptree_set_clear_color(brw, irb->mt, clear_color);
 
       /* If the buffer is already in INTEL_FAST_CLEAR_STATE_CLEAR, the clear
        * is redundant and can be skipped.

src/mesa/drivers/dri/i965/intel_mipmap_tree.c

@@ -36,7 +36,6 @@
 
 #include "brw_blorp.h"
 #include "brw_context.h"
-#include "brw_meta_util.h"
 #include "brw_state.h"
 
 #include "main/enums.h"
@@ -3725,11 +3724,8 @@ get_isl_dim_layout(const struct gen_device_info *devinfo,
 bool
 intel_miptree_set_clear_color(struct brw_context *brw,
                               struct intel_mipmap_tree *mt,
-                              const union gl_color_union *color)
+                              union isl_color_value clear_color)
 {
-   const union isl_color_value clear_color =
-      brw_meta_convert_fast_clear_color(brw, mt, color);
-
    if (memcmp(&mt->fast_clear_color, &clear_color, sizeof(clear_color)) != 0) {
       mt->fast_clear_color = clear_color;
       brw->ctx.NewDriverState |= BRW_NEW_AUX_STATE;

src/mesa/drivers/dri/i965/intel_mipmap_tree.h

@@ -706,7 +706,7 @@ intel_miptree_sample_with_hiz(struct brw_context *brw,
 bool
 intel_miptree_set_clear_color(struct brw_context *brw,
                               struct intel_mipmap_tree *mt,
-                              const union gl_color_union *color);
+                              union isl_color_value clear_color);
 
 /* Get a clear color suitable for filling out an ISL surface state. */
 union isl_color_value