drm: drop drmP.h include from drm_crtc.c

This is starting to become easy!

v2: Compiles now, with drm/drm_util.h extracted.

v3: Fix up commit message (Sam Ravnborg)
Reviewed-by: NSean Paul <seanpaul@chromium.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180905135711.28370-4-daniel.vetter@ffwll.ch

drivers/gpu/drm/drm_crtc.c

@@ -34,7 +34,7 @@
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <linux/dma-fence.h>
-#include <drm/drmP.h>
+#include <linux/uaccess.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_fourcc.h>
@@ -42,6 +42,9 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_auth.h>
 #include <drm/drm_debugfs_crc.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_print.h>
+#include <drm/drm_file.h>
 
 #include "drm_crtc_internal.h"
 #include "drm_internal.h"