drm/dp: drmP.h include removal

Continue to get rid of drmP.h. Add minimal includes to build. Sort
includes while at it.
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190506095248.20874-1-jani.nikula@intel.com

drivers/gpu/drm/drm_dp_aux_dev.c

@@ -27,15 +27,17 @@
 
 #include <linux/device.h>
 #include <linux/fs.h>
-#include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/sched/signal.h>
+#include <linux/slab.h>
 #include <linux/uaccess.h>
 #include <linux/uio.h>
-#include <drm/drm_dp_helper.h>
+
 #include <drm/drm_crtc.h>
-#include <drm/drmP.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_print.h>
 
 #include "drm_crtc_helper_internal.h"
 

drivers/gpu/drm/drm_dp_dual_mode_helper.c

@@ -20,13 +20,15 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#include <linux/delay.h>
 #include <linux/errno.h>
 #include <linux/export.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+
 #include <drm/drm_dp_dual_mode_helper.h>
-#include <drm/drmP.h>
+#include <drm/drm_print.h>
 
 /**
  * DOC: dp dual mode helpers

drivers/gpu/drm/drm_dp_helper.c

@@ -20,16 +20,18 @@
  * OF THIS SOFTWARE.
  */
 
-#include <linux/kernel.h>
-#include <linux/module.h>
 #include <linux/delay.h>
-#include <linux/init.h>
 #include <linux/errno.h>
-#include <linux/sched.h>
 #include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
 #include <linux/seq_file.h>
+
 #include <drm/drm_dp_helper.h>
-#include <drm/drmP.h>
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
 
 #include "drm_crtc_helper_internal.h"
 

drivers/gpu/drm/drm_dp_mst_topology.c

@@ -20,19 +20,20 @@
  * OF THIS SOFTWARE.
  */
 
-#include <linux/kernel.h>
 #include <linux/delay.h>
-#include <linux/init.h>
 #include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/seq_file.h>
-#include <linux/i2c.h>
-#include <drm/drm_dp_mst_helper.h>
-#include <drm/drmP.h>
 
-#include <drm/drm_fixed.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_dp_mst_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fixed.h>
+#include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 
 /**