staging:r8188eu: remove unused WPA_(GET|PUT)_(BE|LE)_xx macro

WPA_(GET|PUT)_(BE|LE)_xx macros are unused, remove it.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>