Staging: wlan-ng: Use generic byteorder macros

This patch removes the ieee2host16(), ieee2host32(), host2ieee16()
and host2ieee32() macros and replaces them with the generic ones.

Signed-off-by: Moritz Muehlenhoff <jmm@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>