net: dsa: mv88e6xxx: use helper for 6390 histogram

The Marvell 88E6390 model has its histogram mode bits moved in the
Global 1 Control 2 register. Use the previously introduced
mv88e6xxx_g1_ctl2_mask helper to set them.

At the same time complete the documentation of the said register.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/global1.h

@@ -201,12 +201,13 @@
 
 /* Offset 0x1C: Global Control 2 */
 #define MV88E6XXX_G1_CTL2			0x1c
-#define MV88E6XXX_G1_CTL2_HIST_RX		0x0040
-#define MV88E6XXX_G1_CTL2_HIST_TX		0x0080
-#define MV88E6XXX_G1_CTL2_HIST_RX_TX		0x00c0
 #define MV88E6185_G1_CTL2_CASCADE_PORT_MASK	0xf000
 #define MV88E6185_G1_CTL2_CASCADE_PORT_NONE	0xe000
 #define MV88E6185_G1_CTL2_CASCADE_PORT_MULTI	0xf000
+#define MV88E6352_G1_CTL2_HEADER_TYPE_MASK	0xc000
+#define MV88E6352_G1_CTL2_HEADER_TYPE_ORIG	0x0000
+#define MV88E6352_G1_CTL2_HEADER_TYPE_MGMT	0x4000
+#define MV88E6390_G1_CTL2_HEADER_TYPE_LAG	0x8000
 #define MV88E6352_G1_CTL2_RMU_MODE_MASK		0x3000
 #define MV88E6352_G1_CTL2_RMU_MODE_DISABLED	0x0000
 #define MV88E6352_G1_CTL2_RMU_MODE_PORT_4	0x1000
@@ -223,6 +224,11 @@
 #define MV88E6390_G1_CTL2_RMU_MODE_PORT_10	0x0300
 #define MV88E6390_G1_CTL2_RMU_MODE_ALL_DSA	0x0600
 #define MV88E6390_G1_CTL2_RMU_MODE_DISABLED	0x0700
+#define MV88E6390_G1_CTL2_HIST_MODE_MASK	0x00c0
+#define MV88E6390_G1_CTL2_HIST_MODE_RX		0x0040
+#define MV88E6390_G1_CTL2_HIST_MODE_TX		0x0080
+#define MV88E6352_G1_CTL2_CTR_MODE_MASK		0x0060
+#define MV88E6390_G1_CTL2_CTR_MODE		0x0020
 #define MV88E6XXX_G1_CTL2_DEVICE_NUMBER_MASK	0x001f
 
 /* Offset 0x1D: Stats Operation Register */