staging: brcm80211: cfg80211 up/down routines in brcmfmac driver are fixed

'__wl_cfg80211_up' & '__wl_cfg80211_down' routines are updated to correctly
set the 'wl->status' variable.

Cc: devel@linuxdriverproject.org
Cc: linux-wireless@vger.kernel.org
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Brett Rudley <brudley@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>