forked from Mirrors/opensbi

This patch adds support for the UART used by the NOEL-V processor. Cobham Gaisler's NOEL-V RISC-V processor IP is available under GPL and commercial license and is described in more detail at https://www.gaisler.com/noelv. Signed-off-by: Daniel Cederman <cederman@gaisler.com> Reviewed-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>