[PATCH] drivers/char/scx200_gpio.c: make code static

This patch makes a needlessly global variable static.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>