drm/radeon/kms: add cayman CS check support

Added to existing evergreen CS checker.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/Makefile b/drivers/gpu/drm/radeon/Makefile
index acdde40..3896ef8 100644
--- a/drivers/gpu/drm/radeon/Makefile
+++ b/drivers/gpu/drm/radeon/Makefile
@@ -53,7 +53,7 @@
 
 $(obj)/r600_cs.o: $(obj)/r600_reg_safe.h
 
-$(obj)/evergreen_cs.o: $(obj)/evergreen_reg_safe.h
+$(obj)/evergreen_cs.o: $(obj)/evergreen_reg_safe.h $(obj)/cayman_reg_safe.h
 
 radeon-y := radeon_drv.o radeon_cp.o radeon_state.o radeon_mem.o \
 	radeon_irq.o r300_cmdbuf.o r600_cp.o