tty: serial: meson: enable console as module

Enable serial driver to be built as a module.  To do so, init the
console support on driver/module load instead of using
console_initcall().

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20201211005744.12855-1-khilman@baylibre.com


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