staging: ath6kl: remove-typedef AR_VIRTUAL_INTERFACE_T

remove-typedef -s AR_VIRTUAL_INTERFACE_T \
	"struct ar_virtual_interface" drivers/staging/ath6kl/

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