staging: wilc1000: wilc_wfi_netdevice.c: remove braces for single statement block

Fix checkpatch warning found by checkpatch.pl
WARNING: braces {} are not necessary for single statement blocks

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