Don't mask out the remapping flag before checking the register offset,
otherwise none of the switch statements will ever match.
Fixes: ff6a64d42ffc (e1000: Consolidate register offset fixups)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>