M2: Revert "gpu: ion: Fix flags passed from userspace in COMPAT ioctl"

Large(r) iommu allocations fail with this fix.

This reverts commit cfa1c655930d1760a3c470bb7d87d3198b1470ad.

Change-Id: I9a7932da8a0ebf4a2412eda82c1a7260f50a7661
M2: ion: using client->heap_mask instead of ion_full_heap_mask in COMPAT ioctl
M2: msm: increase video pool for video IOMMU domain

Pool was too small for needed allocations - was causing vidc failures.

Also add back camera related device contexts.

Taken out in:

c691805 msm: camera: Dynamically register domain and attach to device.
Merge branch 'cm-10.1' of github.com:task650/underwear_kernel_d2_4.2 into cm-10.1