serial/ns16550: ns16550 has a different register layout on SOC_DA8XX

also fix NS16550_init() as we need 16x divider

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Acked-by: Christian Riesch <christian.riesch@omicron.at>
Tested-by: Christian Riesch <christian.riesch@omicron.at>
Acked-by: Sughosh Ganu <urwithsughosh@gmail.com>
Tested-by: Sughosh Ganu <urwithsughosh@gmail.com>
2 files changed