staging: rtl8723au: core: rtw_cmd: Add blank line after declarations

The following patch fixes the checkpatch.pl warning:

drivers/staging/rtl8723au/core/rtw_ap.c Warning: Missing a blank line after declarations

Signed-off-by: Yeliz Taneroglu <yeliztaneroglu@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>