fix typo in command value in drivers/net/phy/mdio-bitbang.

mdio-bitbang mentioned 10 for both read and write.
However mdio read opcode is 10 and write opcode is 01
Fixed comment.
Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-bitbang.c

@@ -113,7 +113,7 @@ static void mdiobb_cmd(struct mdiobb_ctrl *ctrl, int op, u8 phy, u8 reg)
 	for (i = 0; i < 32; i++)
 		mdiobb_send_bit(ctrl, 1);
 
-	/* send the start bit (01) and the read opcode (10) or write (10).
+	/* send the start bit (01) and the read opcode (10) or write (01).
 	   Clause 45 operation uses 00 for the start and 11, 10 for
 	   read/write */
 	mdiobb_send_bit(ctrl, 0);