net: dsa: mv88e6xxx: prefix Global 2 Device Mapping macros

Prefix and document the Global 2 Device Mapping macros.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mv88e6xxx/global2.h b/drivers/net/dsa/mv88e6xxx/global2.h
index c838c51..dd9b243 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.h
+++ b/drivers/net/dsa/mv88e6xxx/global2.h
@@ -31,10 +31,12 @@
 #define GLOBAL2_SWITCH_MGMT_FLOW_CONTROL_MSG	BIT(13)
 #define GLOBAL2_SWITCH_MGMT_FORCE_FLOW_CTRL_PRI	BIT(7)
 #define GLOBAL2_SWITCH_MGMT_RSVD2CPU		BIT(3)
-#define GLOBAL2_DEVICE_MAPPING	0x06
-#define GLOBAL2_DEVICE_MAPPING_UPDATE		BIT(15)
-#define GLOBAL2_DEVICE_MAPPING_TARGET_SHIFT	8
-#define GLOBAL2_DEVICE_MAPPING_PORT_MASK	0x0f
+
+/* Offset 0x06: Device Mapping Table Register */
+#define MV88E6XXX_G2_DEVICE_MAPPING		0x06
+#define MV88E6XXX_G2_DEVICE_MAPPING_UPDATE	0x8000
+#define MV88E6XXX_G2_DEVICE_MAPPING_DEV_MASK	0x1f00
+#define MV88E6XXX_G2_DEVICE_MAPPING_PORT_MASK	0x000f
 
 /* Offset 0x07: Trunk Mask Table Register */
 #define MV88E6XXX_G2_TRUNK_MASK			0x07