staging: rtl8723bs: Remove unecessary braces from switch statement.

The switch statement in rtw_wx_set_auth() wraps individual cases in
braces for no reason.  Remove those braces and unindent the code.

Signed-off-by: Quytelda Kahja <quytelda@tamalin.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>