RAS: Make local function parse_ras_param() static

Make parse_ras_param() static as it is used locally only.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/20170516161034.2973-1-weiyj.lk@gmail.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>