drm/xe: Modify the cfb size to be page size aligned for FBC

drm_gem_private_object_init expect the object size be page size
aligned. The xe_bo create functions do not update the size for
any alignment requirements. So align cfb size to be page size
aligned in xe stolen memory handling.
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240112092803.61664-2-vinod.govindapillai@intel.com

drivers/gpu/drm/xe/compat-i915-headers/i915_gem_stolen.h

@@ -19,6 +19,9 @@ static inline int i915_gem_stolen_insert_node_in_range(struct xe_device *xe,
 	int err;
 	u32 flags = XE_BO_CREATE_PINNED_BIT | XE_BO_CREATE_STOLEN_BIT;
 
+	if (align)
+		size = ALIGN(size, align);
+
 	bo = xe_bo_create_locked_range(xe, xe_device_get_root_tile(xe),
 				       NULL, size, start, end,
 				       ttm_bo_type_kernel, flags);