USB: gadget: udc: s3c2410_udc: s3c2410_udc_set_ep0_ss() can be static

s3c2410_udc_set_ep0_ss() only used within this file. It should be static.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210513050544.625824-1-yangyingliang@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>