net: usb: asix: remove redundant assignment to variable reg

Variable reg is being masked however the variable is never read
after this. The assignment is redundant and can be removed.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20220123184035.112785-1-colin.i.king@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/usb/asix_devices.c

@@ -858,7 +858,6 @@ static int marvell_phy_init(struct usbnet *dev)
 		reg = asix_mdio_read(dev->net, dev->mii.phy_id,
 			MII_MARVELL_LED_CTRL);
 		netdev_dbg(dev->net, "MII_MARVELL_LED_CTRL (2) = 0x%04x\n", reg);
-		reg &= 0xfc0f;
 	}
 
 	return 0;