drm/amd: drop use of drmP.h in atom.h

Drop use of the deprecated drmP.h header from atom.h

Fix fallout in various files.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190609220757.10862-6-sam@ravnborg.org

drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c

@@ -24,6 +24,7 @@
  */
 
 #include <linux/irqdomain.h>
+#include <linux/pci.h>
 #include <linux/pm_domain.h>
 #include <linux/platform_device.h>
 #include <sound/designware_i2s.h>

drivers/gpu/drm/amd/amdgpu/atom.h

@@ -26,7 +26,8 @@
 #define ATOM_H
 
 #include <linux/types.h>
-#include <drm/drmP.h>
+
+struct drm_device;
 
 #define ATOM_BIOS_MAGIC		0xAA55
 #define ATOM_ATI_MAGIC_PTR	0x30

drivers/gpu/drm/amd/display/dc/bios/bios_parser.c

@@ -23,6 +23,8 @@
  *
  */
 
+#include <linux/slab.h>
+
 #include "dm_services.h"
 
 #include "atom.h"

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -23,6 +23,8 @@
  *
  */
 
+#include <linux/slab.h>
+
 #include "dm_services.h"
 #include "atom.h"
 #include "dm_helpers.h"

drivers/gpu/drm/amd/display/dc/dce/dce_abm.c

@@ -23,6 +23,8 @@
  *
  */
 
+#include <linux/slab.h>
+
 #include "dce_abm.h"
 #include "dm_services.h"
 #include "reg_helper.h"

drivers/gpu/drm/amd/powerplay/hwmgr/smu_helper.c

@@ -20,6 +20,9 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  */
+
+#include <linux/pci.h>
+
 #include "hwmgr.h"
 #include "pp_debug.h"
 #include "ppatomctrl.h"

drivers/gpu/drm/amd/powerplay/smu_v11_0.c

@@ -20,8 +20,10 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include "pp_debug.h"
 #include <linux/firmware.h>
+#include <linux/module.h>
+
+#include "pp_debug.h"
 #include "amdgpu.h"
 #include "amdgpu_smu.h"
 #include "atomfirmware.h"