drm/i915/dgfx: define llc and snooping behaviour

While we do lack the faster shared LLC, we should still have support
for snooping over PCIe.
Signed-off-by: NMichel Thierry <michel.thierry@intel.com>
Signed-off-by: NMatthew Auld <matthew.auld@intel.com>
Reviewed-by: NLucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: NLucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201014191937.1266226-11-lucas.demarchi@intel.com

drivers/gpu/drm/i915/i915_pci.c

@@ -908,6 +908,8 @@ static const struct intel_device_info rkl_info = {
 	GEN12_FEATURES, \
 	.memory_regions = REGION_SMEM | REGION_LMEM, \
 	.has_master_unit_irq = 1, \
+	.has_llc = 0, \
+	.has_snoop = 1, \
 	.is_dgfx = 1
 
 static const struct intel_device_info dg1_info __maybe_unused = {