staging: vt6655: drop off byRxMode var in device.h

Drop off unused variable byRxMode in device.h

Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
Link: https://lore.kernel.org/r/20211225173500.5459-1-tomm.merciai@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>