Some mvebu boards have the UART1 more easily accessible than the other UARTs
found on the system.
Add a debug_ll option for this case.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Jason Cooper <jason@lakedaemon.net> Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch>