staging: vt6656: fix definitions of DEVICE_FLAGS_* flags

test_bit and set_bit take the bit number to operate on, rather than a
mask. This patch fixes the DEVICE_FLAGS_* definitions so that they represent
the bit index in priv->flags as opposed to the mask returned by the
BIT macro.

Signed-off-by: Alexey Tulia <alexey.tulia@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>