drm/exynos: drop drmP.h usage

Drop use of the deprecated drmP.h file.
Replace with forwards / externals as appropriate.

While touching the list of include files divide
them up in blocks and sort them.

v3:
- fix build errors in exynos_drm_g2d.c (Inki Dae)
  The exynos_drm_g2d.c file is not built in the
  standard configurations and was therefore missed.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Fixed merge conflict.
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_hdmi.c

@@ -9,38 +9,37 @@
  * Based on drivers/media/video/s5p-tv/hdmi_drv.c
  */
 
-#include <drm/drmP.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_edid.h>
-#include <drm/drm_probe_helper.h>
-
-#include "regs-hdmi.h"
-
-#include <linux/kernel.h>
-#include <linux/wait.h>
-#include <linux/i2c.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/pm_runtime.h>
+#include <drm/exynos_drm.h>
 #include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/delay.h>
 #include <linux/gpio/consumer.h>
-#include <linux/regulator/consumer.h>
+#include <linux/hdmi.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
 #include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
 #include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
-#include <linux/hdmi.h>
-#include <linux/component.h>
-#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/regmap.h>
-#include <sound/hdmi-codec.h>
-#include <drm/exynos_drm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/wait.h>
 
+#include <sound/hdmi-codec.h>
 #include <media/cec-notifier.h>
 
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
 #include "exynos_drm_crtc.h"
+#include "regs-hdmi.h"
 
 #define HOTPLUG_DEBOUNCE_MS		1100