staging/vboxvideo: prepare for drmP.h removal from drm_modeset_helper.h

The use of drmP.h is discouraged and removal of it from
drm_modeset_helper.h caused vboxvideo to fail to build.

This patch introduce the necessary fixes to prepare for the
drmP.h removal from drm_modeset_helper.h.

In the files touched sort the include files

Build tested on x86 and arm allmodconfig / allyesconfig.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190126122527.11647-2-sam@ravnborg.org

drivers/staging/vboxvideo/vbox_drv.c

@@ -7,11 +7,15 @@
  *          Michael Thayer <michael.thayer@oracle.com,
  *          Hans de Goede <hdegoede@redhat.com>
  */
-#include <linux/module.h>
 #include <linux/console.h>
+#include <linux/module.h>
+#include <linux/pci.h>
 #include <linux/vt_kern.h>
 
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_ioctl.h>
 
 #include "vbox_drv.h"
 

drivers/staging/vboxvideo/vbox_fb.c

@@ -6,20 +6,22 @@
  * Authors: Dave Airlie <airlied@redhat.com>
  *          Michael Thayer <michael.thayer@oracle.com,
  */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/tty.h>
-#include <linux/sysrq.h>
 #include <linux/delay.h>
+#include <linux/errno.h>
 #include <linux/fb.h>
 #include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/sysrq.h>
+#include <linux/tty.h>
 
 #include <drm/drm_crtc.h>
-#include <drm/drm_fb_helper.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
 
 #include "vbox_drv.h"
 #include "vboxvideo.h"

drivers/staging/vboxvideo/vbox_mode.c

@@ -10,14 +10,17 @@
  *          Hans de Goede <hdegoede@redhat.com>
  */
 #include <linux/export.h>
+
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_fourcc.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
 
+#include "hgsmi_channels.h"
 #include "vbox_drv.h"
 #include "vboxvideo.h"
-#include "hgsmi_channels.h"
 
 /*
  * Set a graphics mode.  Poke any required values into registers, do an HGSMI