net: dsa: microchip: ksz8: fix MDB configuration with non-zero VID

FID is directly mapped to VID. However, configuring a MAC address with a
VID != 0 resulted in incorrect configuration due to an incorrect bit
mask. This kernel commit fixed the issue by correcting the bit mask and
ensuring proper configuration of MAC addresses with non-zero VID.

Fixes: 4b20a07e ("net: dsa: microchip: ksz8795: add support for ksz88xx chips")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/microchip/ksz_common.c

@@ -404,7 +404,7 @@ static const u32 ksz8863_masks[] = {
 	[VLAN_TABLE_VALID]		= BIT(19),
 	[STATIC_MAC_TABLE_VALID]	= BIT(19),
 	[STATIC_MAC_TABLE_USE_FID]	= BIT(21),
-	[STATIC_MAC_TABLE_FID]		= GENMASK(29, 26),
+	[STATIC_MAC_TABLE_FID]		= GENMASK(25, 22),
 	[STATIC_MAC_TABLE_OVERRIDE]	= BIT(20),
 	[STATIC_MAC_TABLE_FWD_PORTS]	= GENMASK(18, 16),
 	[DYNAMIC_MAC_TABLE_ENTRIES_H]	= GENMASK(1, 0),