The debug uart settings from the DEBUG_RK3X_UART options are usable on
all Rockchip SoCs from the rk30xx and rk31xx series but not on the
new rk3288 SoCs. Thus clarify their use to prevent confusion.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Reviewed-by: NDoug Anderson <dianders@chromium.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>