[PATCH] drivers/net/sk98lin/skge.c: make SkPciWriteCfgDWord() a static inline

No external user and that small - such a function should be static
inline and not a global function.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>