staging: vt6656: dead code remove RXvWorkItem and RXvFreeRCB

Remove work_struct and queue variables

Remove EnqueueRCB and DequeueRCB macros

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/vt6656/device.h
Simple merge

diff --cc drivers/staging/vt6656/dpc.c
Simple merge

diff --cc drivers/staging/vt6656/main_usb.c
Simple merge