Revert "msm: 8930, 8960: Remove double reservation of MM_FW heap"

This reverts commit 9126c041d9c1c4d2b598d171c9a5296cc2210ac1.
Revert "msm: vidc: Amend error check conditions on ION APIs"

This reverts commit 4a592395e459edc1183aceeed2a64b82b0c26a74.
Revert "msm: vidc: Validate input data before processing"

This reverts commit 7d652e52dcdbc954f231bfb58f1635d293c5a5f6.