drm/radeon: track VM update fences separately

Note for each fence if it's a VM page table update or not. This allows
us to determine the last VM update in a sync object and so to figure
out if we need to flush the TLB or not.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

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

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

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

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