r8169: Fix trivial typo in rtl_check_firmware

Change 'firwmare' to 'firmware'

Signed-off-by: Yannick Guerrini <yguerrini@tomshardware.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index b156092..c70ab40 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -2561,7 +2561,7 @@
 	int rc = -EINVAL;
 
 	if (!rtl_fw_format_ok(tp, rtl_fw)) {
-		netif_err(tp, ifup, dev, "invalid firwmare\n");
+		netif_err(tp, ifup, dev, "invalid firmware\n");
 		goto out;
 	}