staging: vt6655: Rename MACvWordRegBitsOn

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/b3873e1103d642a804d42c945dc0c73d94b0c1cf.1657657918.git.philipp.g.hortmann@gmail.com


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