staging: wilc1000: make add_virtual_intf static

This patch makes add_virtual_intf static. This function is used only at
wilc_wfi_cfgoperation.c file.

Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed