drivers/tty/nozomi.c: rename CONFIG_MAGIC

The CONFIG_ prefix is reserved for Kconfig options in Make and CPP
syntax.  CONFIG_MAGIC is a file local CPP identifier so change the
prefix to apply to Kconfig's naming convention.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>