net: moxa: Fix comparison to NULL could be written with !

Fixed coding style for null comparisons in moxart_ether driver
to be more consistent with the rest of the kernel coding style

Signed-off-by: SZ Lin <sz.lin@moxa.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
SZ Lin 2017-07-29 18:42:36 +08:00 • committed by David S. Miller
commit e8048b84bb