net: bna: Fix spelling mistake "muliple" -> "multiple"

There is a spelling mistake in a literal string in the array
bnad_net_stats_strings. Fix it.

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/brocade/bna/bnad_ethtool.c

···
 	"mac_tx_deferral",
 	"mac_tx_excessive_deferral",
 	"mac_tx_single_collision",
-	"mac_tx_muliple_collision",
+	"mac_tx_multiple_collision",
 	"mac_tx_late_collision",
 	"mac_tx_excessive_collision",
 	"mac_tx_total_collision",