staging: vt6655: Rename MACvRegBitsOn

Fix name of a macro that uses CamelCase which is not
accepted by checkpatch.pl

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/7fb9627441ff97897d132c62d59676355b6d14ea.1657657918.git.philipp.g.hortmann@gmail.com


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