drm/radeon: Remove radeon_gart_restore()

Doesn't seem necessary, the GART table memory should be persistent.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

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

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

diff --cc drivers/gpu/drm/radeon/r100.c
Simple merge

diff --cc drivers/gpu/drm/radeon/r300.c
Simple merge

diff --cc drivers/gpu/drm/radeon/r600.c
Simple merge

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

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

diff --cc drivers/gpu/drm/radeon/rs400.c
Simple merge

diff --cc drivers/gpu/drm/radeon/rs600.c
Simple merge

diff --cc drivers/gpu/drm/radeon/rv770.c
Simple merge

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