drm/amd/display: Improve sharing of HUBBUB register lists

Add DCN20 common register list that contains registers shared
between DCN20 generations.
Signed-off-by: Julian Parkin <julian.parkin@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubbub.h

@@ -32,10 +32,8 @@
 #define TO_DCN20_HUBBUB(hubbub)\
 	container_of(hubbub, struct dcn20_hubbub, base)
 
-#define HUBBUB_REG_LIST_DCN20(id)\
+#define HUBBUB_REG_LIST_DCN20_COMMON()\
 	HUBBUB_REG_LIST_DCN_COMMON(), \
-	HUBBUB_VM_REG_LIST(), \
-	HUBBUB_SR_WATERMARK_REG_LIST(), \
 	SR(DCHUBBUB_CRC_CTRL), \
 	SR(DCN_VM_FB_LOCATION_BASE),\
 	SR(DCN_VM_FB_LOCATION_TOP),\
@@ -44,6 +42,11 @@
 	SR(DCN_VM_AGP_TOP),\
 	SR(DCN_VM_AGP_BASE)
 
+#define HUBBUB_REG_LIST_DCN20(id)\
+	HUBBUB_REG_LIST_DCN20_COMMON(), \
+	HUBBUB_SR_WATERMARK_REG_LIST(), \
+	HUBBUB_VM_REG_LIST()
+
 #define HUBBUB_MASK_SH_LIST_DCN20(mask_sh)\
 	HUBBUB_MASK_SH_LIST_DCN_COMMON(mask_sh), \
 	HUBBUB_MASK_SH_LIST_STUTTER(mask_sh), \