brcm80211: use endian annotation for scan time configuration
For scanning several timeout parameters are configured on the device.
These parameters have been endian annotated and converted appropriately.
Reported-by: Johannes Berg <johannes@sipsolutions.net> Reviewed-by: Roland Vossen <rvossen@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>