forked from Mirrors/opensbi

The age old version of Shakti UART was upgraded long back, but we missed updating the driver in OpenSBI. The old version of UART is not supported anymore, hence removed the inline comment which is also outdated now. Signed-off-by: Prasanna T <ptprasanna@gmail.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Xiang W <wxjstz@126.com>