b3d4ef8348
In order to support additional channels of communication using `-serial`, add several serial ports, up to the standard 4 generally supported by the 8250 driver. Fixed: https://lore.kernel.org/all/20240907143439.2792924-1-Jason@zx2c4.com/ Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Tested-by: Bibo Mao <maobibo@loongson.cn> [gaosong: ACPI uart need't reverse order] Signed-off-by: Song Gao <gaosong@loongson.cn> Message-Id: <20240907143439.2792924-1-Jason@zx2c4.com>