intel: Set a preferred SLM size for LNL

Signed-off-by: Rohan Garg <rohan.garg@intel.com>
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26390>

src/intel/common/intel_genX_state.h

@@ -134,6 +134,9 @@ preferred_slm_allocation_size(const struct intel_device_info *devinfo)
    if (intel_needs_workaround(devinfo, 14017245111))
       return SLM_ENCODES_96K;
 
+   if (devinfo->platform == INTEL_PLATFORM_LNL && devinfo->revision == 0)
+      return SLM_ENCODES_128K;
+
    return 0;
 }