ARM: 6084/1: ux500: move UART devices to devices.c

The three PL011 UARTs are common among Ux500 SoCs, so move them to
devices.c.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>