staging: rtl8192u: fix line size and identation in r819xU_cmdpkt.c

This patch limits the line size below 80 characters, when
possible, and fixes identation to meet kernel coding style
convetions.

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