[PATCH] libertas: fix u8 constant

Don't write constants that are (per documentation and struct) u8
as 0x0001, use 0x01 instead. Also remove an useless cast.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-By: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>