UAPI: (Scripted) Remove redundant DRM UAPI header #inclusions from drivers/gpu/.

Remove redundant DRM UAPI header #inclusions from drivers/gpu/.

Remove redundant #inclusions of core DRM UAPI headers (drm.h, drm_mode.h and
drm_sarea.h).  They are now #included via drmP.h and drm_crtc.h via a preceding
patch.

Without this patch and the patch to make include the UAPI headers from the core
headers, after the UAPI split, the DRM C sources cannot find these UAPI headers
because the DRM code relies on specific -I flags to make #include "..."  work
on headers in include/drm/ - but that does not work after the UAPI split without
adding more -I flags.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>

Conflicts:
	drivers/gpu/drm/ast/ast_drv.c
	drivers/gpu/drm/ast/ast_fb.c
	drivers/gpu/drm/cirrus/cirrus_drv.c
	drivers/gpu/drm/cirrus/cirrus_fbdev.c
	drivers/gpu/drm/cirrus/cirrus_main.c
	drivers/gpu/drm/cirrus/cirrus_mode.c
	drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
	drivers/gpu/drm/i915/i915_gem_stolen.c
	drivers/gpu/drm/mgag200/mgag200_drv.c
	drivers/gpu/drm/mgag200/mgag200_fb.c
	drivers/gpu/drm/mgag200/mgag200_i2c.c
	drivers/gpu/drm/mgag200/mgag200_main.c
	drivers/gpu/drm/mgag200/mgag200_mode.c
	drivers/gpu/drm/nouveau/nouveau_gpuobj.c
	drivers/gpu/drm/nouveau/nouveau_prime.c
	drivers/gpu/drm/nouveau/nv04_instmem.c
	drivers/gpu/drm/nouveau/nv17_fifo.c
	drivers/gpu/drm/nouveau/nv84_fifo.c
	drivers/gpu/drm/radeon/radeon_prime.c