ath6kl: remove-typedef HIF_DEVICE_MBOX_INFO

remove-typedef -s HIF_DEVICE_MBOX_INFO \
	"struct hif_device_mbox_info" drivers/staging/ath6kl/

Tested-by: Naveen Singh <nsingh@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>