M2: msm: fixed area start at 0xb0*

I mistakenly changed it to 0xa00* (stock caf value) in

9db21fdc3b998cdeed0dd4f42d30a5371a9b821f M2: update ion allocations

even though the commit message states we're sticking with 0xb0*.

Large contiguous allocations starting at 0xa0* fail spectacularly for
us.
M2: msm: grow MM heap size for the iommu use case

From 56 to 96 MB.

Too small of a heap and we get vidc induced iommu pagefaults when
recording 1080p video with the rear camera.

Change-Id: I70f2a1e76bda98c671ede22592ce564ce5fcd628