drm/radeon/cik: Add tiling mode index for 1D tiled depth/stencil surfaces

CIK uses a different index for 1D DST surfaces compared to SI.  Expose
the new index so libdrm_radeon can use it properly for userspace
drivers.
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

include/uapi/drm/radeon_drm.h

@@ -1007,4 +1007,6 @@ struct drm_radeon_info {
 #define SI_TILE_MODE_DEPTH_STENCIL_2D_4AA	3
 #define SI_TILE_MODE_DEPTH_STENCIL_2D_8AA	2
 
+#define CIK_TILE_MODE_DEPTH_STENCIL_1D		5
+
 #endif