Staging: rtl8192su: changed check_reset_cnt to be static again

variable check_reset_cnt in rtl819x_watchdog_wqcallback is now static
again.

also, little cosmetics.

Signed-off-by: Florian Schilhabel <florian.c.schilhabel@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>