drm/radeon/kms: add some new ring params to better handle other ring types

Some rptr/wptrs fields have different offsets and not all rings are pm4
so add a new nop field.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <deathsimple@vodafone.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index f2deadf..48bd820 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2474,7 +2474,8 @@
 	r600_irq_set(rdev);
 
 	r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP_RPTR_OFFSET,
-			     R600_CP_RB_RPTR, R600_CP_RB_WPTR);
+			     R600_CP_RB_RPTR, R600_CP_RB_WPTR,
+			     0, 0xfffff, RADEON_CP_PACKET2);
 
 	if (r)
 		return r;