rockchip: enable SYS_NS16550 for all SoCs by default

All rockchip SoCs can use ns16550 driver, enable it for all
and set SYS_NS16550_MEM32 for all SoCs.

Version-changes: 2
- use imply instead of select

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
7 files changed