ARM: ux500: Clean-up MSP platform code

This patch contains a couple of general MSP clean-ups pertaining to
layout changes and changing functions to be void instead of int instead
of regardlessly returning '0'.

Acked-by: Ola Lilja <ola.o.lilja@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>