drm/i915/dg2: Use I915_BO_ALLOC_CONTIGUOUS flag for DPT

Do mapping using CONTIGUOUS flag - otherwise
i915_gem_object_is_contiguous warn is triggered.
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211209141817.16038-1-stanislav.lisovskiy@intel.com

drivers/gpu/drm/i915/display/intel_dpt.c

@@ -249,7 +249,7 @@ intel_dpt_create(struct intel_framebuffer *fb)
 	size = round_up(size * sizeof(gen8_pte_t), I915_GTT_PAGE_SIZE);
 
 	if (HAS_LMEM(i915))
-		dpt_obj = i915_gem_object_create_lmem(i915, size, 0);
+		dpt_obj = i915_gem_object_create_lmem(i915, size, I915_BO_ALLOC_CONTIGUOUS);
 	else
 		dpt_obj = i915_gem_object_create_stolen(i915, size);
 	if (IS_ERR(dpt_obj))