liquidio: fix spelling mistake: "mac_tx_multi_collison" -> "mac_tx_multi_collision"

Trivial fix to spelling mistake in oct_stats_strings text
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/liquidio/lio_ethtool.c

@@ -122,7 +122,7 @@ static const char oct_stats_strings[][ETH_GSTRING_LEN] = {
 	"mac_tx_ctl_packets",
 	"mac_tx_total_collisions",
 	"mac_tx_one_collision",
-	"mac_tx_multi_collison",
+	"mac_tx_multi_collision",
 	"mac_tx_max_collision_fail",
 	"mac_tx_max_deferal_fail",
 	"mac_tx_fifo_err",