drm/mga: drop use of drmP.h

Drop the use of the deprecated drmP.h header file.
Clean up list of include files and sort them.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Link: https://patchwork.freedesktop.org/patch/msgid/20190623103542.30697-4-sam@ravnborg.org

drivers/gpu/drm/mga/mga_dma.c

@@ -37,8 +37,6 @@
 
 #include <linux/delay.h>
 
-#include <drm/drmP.h>
-#include <drm/mga_drm.h>
 #include "mga_drv.h"
 
 #define MGA_DEFAULT_USEC_TIMEOUT	10000

drivers/gpu/drm/mga/mga_drv.c

@@ -31,12 +31,11 @@
 
 #include <linux/module.h>
 
-#include <drm/drmP.h>
-#include <drm/mga_drm.h>
-#include "mga_drv.h"
-
+#include <drm/drm_drv.h>
 #include <drm/drm_pciids.h>
 
+#include "mga_drv.h"
+
 static struct pci_device_id pciidlist[] = {
 	mga_PCI_IDS
 };

drivers/gpu/drm/mga/mga_ioc32.c

@@ -30,10 +30,9 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  * IN THE SOFTWARE.
  */
+
 #include <linux/compat.h>
 
-#include <drm/drmP.h>
-#include <drm/mga_drm.h>
 #include "mga_drv.h"
 
 typedef struct drm32_mga_init {

drivers/gpu/drm/mga/mga_irq.c

@@ -31,8 +31,6 @@
  *    Eric Anholt <anholt@FreeBSD.org>
  */
 
-#include <drm/drmP.h>
-#include <drm/mga_drm.h>
 #include "mga_drv.h"
 
 u32 mga_get_vblank_counter(struct drm_device *dev, unsigned int pipe)

drivers/gpu/drm/mga/mga_state.c

@@ -32,8 +32,6 @@
  *    Gareth Hughes <gareth@valinux.com>
  */
 
-#include <drm/drmP.h>
-#include <drm/mga_drm.h>
 #include "mga_drv.h"
 
 /* ================================================================

drivers/gpu/drm/mga/mga_warp.c

@@ -29,11 +29,9 @@
 
 #include <linux/firmware.h>
 #include <linux/ihex.h>
-#include <linux/platform_device.h>
 #include <linux/module.h>
+#include <linux/platform_device.h>
 
-#include <drm/drmP.h>
-#include <drm/mga_drm.h>
 #include "mga_drv.h"
 
 #define FIRMWARE_G200 "matrox/g200_warp.fw"