cs89x0: Removing dead SH_HICOSH4

SH_HICOSH4 doesn't exist in Kconfig, therefore removing all references
for it from the source code.

Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/cs89x0.c
Simple merge

diff --cc drivers/net/cs89x0.h
Simple merge