staging: wlan-ng: hfa384x: fix several type issues.

There were several in-place conversions of 16 and 32-bit data, which caused
sparse to detect them. Changed them to the in situ versions, such as:
le16_to_cpu -> le16_to_cpus

Signed-off-by: Nikola Jelic <nikola.jelic83@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>