drm/radeon: initial VCE support v4

Only VCE 2.0 support so far.

v2: squashing multiple patches into this one
v3: add IRQ support for CIK, major cleanups,
    basic code documentation
v4: remove HAINAN from chipset list

Signed-off-by: Christian König <christian.koenig@amd.com>

diff --cc drivers/gpu/drm/radeon/Makefile
Simple merge

diff --cc drivers/gpu/drm/radeon/cik.c
Simple merge

diff --cc drivers/gpu/drm/radeon/cikd.h
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon.h
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_asic.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_asic.h
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_cs.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_kms.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_ring.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_test.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_vce.c
Simple merge

diff --cc drivers/gpu/drm/radeon/sid.h
Simple merge

diff --cc drivers/gpu/drm/radeon/vce_v1_0.c
Simple merge

diff --cc drivers/gpu/drm/radeon/vce_v2_0.c
Simple merge

diff --cc include/uapi/drm/radeon_drm.h
Simple merge