rtl8712: don't just return -EFAULT in wpa_supplicant_ioctl()

There were some curly braces missing so the original code in
wpa_supplicant_ioctl() pretty much always returned -EFAULT without
doing anything.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>