net: mscc: ocelot: fix address of SYS_COUNT_TX_AGING counter

This register, used as part of stats->tx_dropped in
ocelot_get_stats64(), has a wrong address. At the address currently
given, there is actually the c_tx_green_prio_6 counter.

Fixes: a556c76 ("net: mscc: Add initial Ocelot switch support")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mscc/vsc7514_regs.c

@@ -202,7 +202,7 @@ const u32 vsc7514_sys_regmap[] = {
 	REG(SYS_COUNT_TX_512_1023,			0x00012c),
 	REG(SYS_COUNT_TX_1024_1526,			0x000130),
 	REG(SYS_COUNT_TX_1527_MAX,			0x000134),
-	REG(SYS_COUNT_TX_AGING,				0x000170),
+	REG(SYS_COUNT_TX_AGING,				0x000178),
 	REG(SYS_RESET_CFG,				0x000508),
 	REG(SYS_CMID,					0x00050c),
 	REG(SYS_VLAN_ETYPE_CFG,				0x000510),