drm: xlnx: dptx: Use correct headers

There's some header changes.

Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com>
State: pending

drivers/gpu/drm/xlnx/xlnx_dptx.c

@@ -22,12 +22,12 @@
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
-#include <drm/drmP.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_connector.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_dp_helper.h>
+#include <drm/drm_fourcc.h>
 #include <drm/drm_of.h>
 #include <drm/drm_probe_helper.h>