intel/compiler: Stop including src/mesa/main/config.h

src/mesa/main includes are for Mesa's OpenGL implementation, and the
compiler is used in Vulkan drivers and other tools.  We really only
needed one #define, which is that we offer 32 samplers.  It probably
makes more sense to have our own defined limit for that rather than
importing a project-wide value which theoretically could be adjusted,
so swap MAX_SAMPLERS for a new BRW_MAX_SAMPLERS and call it a day.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17309>

src/intel/compiler/brw_compiler.h

@@ -27,7 +27,6 @@
 #include <stdio.h>
 #include "c11/threads.h"
 #include "dev/intel_device_info.h"
-#include "main/config.h"
 #include "util/ralloc.h"
 #include "util/u_math.h"
 
@@ -177,6 +176,8 @@ enum PACKED gfx6_gather_sampler_wa {
    WA_16BIT = 4,     /* if we have a 16bit format needing wa */
 };
 
+#define BRW_MAX_SAMPLERS 32
+
 /**
  * Sampler information needed by VS, WM, and GS program cache keys.
  */
@@ -184,7 +185,7 @@ struct brw_sampler_prog_key_data {
    /**
     * EXT_texture_swizzle and DEPTH_TEXTURE_MODE swizzles.
     */
-   uint16_t swizzles[MAX_SAMPLERS];
+   uint16_t swizzles[BRW_MAX_SAMPLERS];
 
    uint32_t gl_clamp_mask[3];
 
@@ -208,7 +209,7 @@ struct brw_sampler_prog_key_data {
    /**
     * For Sandybridge, which shader w/a we need for gather quirks.
     */
-   enum gfx6_gather_sampler_wa gfx6_gather_wa[MAX_SAMPLERS];
+   enum gfx6_gather_sampler_wa gfx6_gather_wa[BRW_MAX_SAMPLERS];
 
    /**
     * Texture units that have a YUV image bound.
@@ -223,7 +224,7 @@ struct brw_sampler_prog_key_data {
    uint32_t bt2020_mask;
 
    /* Scale factor for each texture. */
-   float scale_factors[32];
+   float scale_factors[BRW_MAX_SAMPLERS];
 };
 
 /** An enum representing what kind of input gl_SubgroupSize is. */

src/intel/compiler/brw_debug_recompile.c

@@ -73,7 +73,7 @@ debug_sampler_recompile(const struct brw_compiler *c, void *log,
    found |= check("ayuv image bound", ayuv_image_mask);
    found |= check("xyuv image bound", xyuv_image_mask);
 
-   for (unsigned i = 0; i < MAX_SAMPLERS; i++) {
+   for (unsigned i = 0; i < BRW_MAX_SAMPLERS; i++) {
       found |= check("EXT_texture_swizzle or DEPTH_TEXTURE_MODE", swizzles[i]);
       found |= check("textureGather workarounds", gfx6_gather_wa[i]);
       found |= check_float("scale factor", scale_factors[i]);