drm: remove drm_ioremap and drm_ioremapfree

hch originally submitted this for paravirt ops work, airlied took it
and cleaned up a lot of unused code caused by using this.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --cc drivers/char/drm/drmP.h
Simple merge

diff --cc drivers/char/drm/drm_bufs.c
Simple merge

diff --cc drivers/char/drm/drm_memory.c
Simple merge

diff --cc drivers/char/drm/drm_memory.h
Simple merge

diff --cc drivers/char/drm/drm_memory_debug.h
Simple merge

diff --cc drivers/char/drm/drm_vm.c
Simple merge