isl: Set MOCS to uncached for MTL stream-out

Without this change various OpenGL CTS tranform feedback tests were
failing.

Cc: 23.2 <mesa-stable>
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23823>

src/intel/isl/isl.c

@@ -251,6 +251,10 @@ isl_mocs(const struct isl_device *dev, isl_surf_usage_flags_t usage,
    if (external)
       return dev->mocs.external | mask;
 
+   if (intel_device_info_is_mtl(dev->info) &&
+       (usage & ISL_SURF_USAGE_STREAM_OUT_BIT))
+      return dev->mocs.uncached | mask;
+
    if (dev->info->verx10 == 120 && dev->info->platform != INTEL_PLATFORM_DG1) {
       if (usage & ISL_SURF_USAGE_STAGING_BIT)
          return dev->mocs.internal | mask;