Add designeware 8250 auto flow ctrl support. Enable it by add auto-flow-control in dts. Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
Add designeware 8250 auto flow ctrl support. Enable it by add auto-flow-control in dts. Signed-off-by: Minda Chen <minda.chen@starfivetech.com>