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>