Staging: wlan-ng: Replace local byteorder macros

Replace hfa384x2host_16(), hfa384x2host_32(), host2hfa384x_16()
and host2hfa384x_32() with standard byteorder macros.

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