tty/serial: 8250: Sort drivers in Makefile

Sort drivers in alphabetic order in Makefile to make it easier to find
the correct line. In case the CONFIG and filenames disagree, sort using
the filename (ignore 8250 prefix while sorting).

In addition, place 8250_early separately above the drivers.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230912103558.20123-2-ilpo.jarvinen@linux.intel.com


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