ARM: dts: msm: Override default ACC settings on MDM9630

On MDM9630, it is necessary to override the default ACC settings
each time Q6 is brought out of reset. Add a device tree property
to do the same.

Change-Id: I2578a06393cf2895e16b0b3b3b28daa27516ae5a
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>