staging: rtl8192u: fix comments in r819xU_phy.h

This patch fixes the comments by:
- changing them to follow the kernel coding style
- removing commented-out code
- removing comments that refer developer's name

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>