intel/tests/mi_builder: Set MI_MATH MOCS field

MOCS = 0 is a invalid MOCS index on MTL, so it is necessary get a
valid value and set to MI_MATH instructions.

So here the mocs index is set with mi_builder_set_mocs(), it can be
always set but it is required when mi_build will emit MI_MATH
instructions.
The mocs index will only be stored and used in gfx12.5+ platforms
so no changes were are required in crocus or hasvk.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22508>

src/intel/common/tests/mi_builder_test.cpp

@@ -32,6 +32,7 @@
 #include "common/intel_gem.h"
 #include "dev/intel_device_info.h"
 #include "intel_gem.h"
+#include "isl/isl.h"
 #include "drm-uapi/i915_drm.h"
 #include "genxml/gen_macros.h"
 #include "util/macros.h"
@@ -311,7 +312,11 @@ mi_builder_test::SetUp()
    memset(data_map, 139, DATA_BO_SIZE);
    memset(&canary, 139, sizeof(canary));
 
+   struct isl_device isl_dev;
+   isl_device_init(&isl_dev, &devinfo);
    mi_builder_init(&b, &devinfo, this);
+   const uint32_t mocs = isl_mocs(&isl_dev, 0, false);
+   mi_builder_set_mocs(&b, mocs);
 }
 
 void *