Embed rs485_supported to uart_port to allow serial core to tweak it as
needed.
Reviewed-by: NLino Sanfilippo <l.sanfilippo@kunbus.com>
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220704094515.6831-2-ilpo.jarvinen@linux.intel.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>