Update serial drivers to use DT_HAS_<compat>_ENABLED Kconfig symbol
to expose the driver and enable it by default based on devicetree.
We remove 'depend on' Kconfig for symbols that would be implied by
the devicetree node existing.
Signed-off-by: Kumar Gala <galak@kernel.org>
Use the shared CONFIG_SERIAL_INIT_PRIORITY for driver initialization
priority.
Override the default value for the NEORV32 SoC to ensure the serial
driver is initialized after the syscon driver by default.
Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>