net: lan78xx: Make declaration style consistent

This patch makes some declaration more consistent.

Change-Id: I527c13fbfa2f040f0930a2e0f1cbe6c59e5c6893
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Raghuram Chary Jallipalli <raghuramchary.jallipalli@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-commit: 51ceac9fb5886febc4116123012caa268277643b
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git


Signed-off-by: Liangliang Lu <luliang@codeaurora.org>