ARM: ux500: Relocate AUXDATA relating to MSP (Audio)

MSP no longer requires clock-name bindings, so we need to move them to
a more appropriate header indicating that we're still passing DMA
related platform data to them.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>