zink: do not lower bools to float

Acked-by: Jordan Justen <jordan.l.justen@intel.com>

src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c

@@ -1434,7 +1434,7 @@ static SpvId
 get_src_bool(struct ntv_context *ctx, nir_src *src)
 {
    SpvId def = get_src_uint(ctx, src);
-   assert(nir_src_bit_size(*src) == 32);
+   assert(nir_src_bit_size(*src) == 1);
    unsigned num_components = nir_src_num_components(*src);
    return uvec_to_bvec(ctx, def, num_components);
 }

src/gallium/drivers/zink/zink_compiler.c

@@ -325,7 +325,6 @@ zink_compile_nir(struct zink_screen *screen, struct nir_shader *nir)
    NIR_PASS_V(nir, lower_uniforms_to_ubo);
    NIR_PASS_V(nir, position_to_vulkan);
    NIR_PASS_V(nir, nir_lower_regs_to_ssa);
-   NIR_PASS_V(nir, nir_lower_bool_to_float);
    optimize_nir(nir);
    NIR_PASS_V(nir, nir_remove_dead_variables, nir_var_function_temp);
    NIR_PASS_V(nir, lower_discard_if);