Revert "Revert "Revert "update ion drivers"""

This reverts commit c8ef3e6a896f8bd50fdb69dbcdbb72c77de893b9.
Revert "Revert "update ion drivers""

This reverts commit 6a90e3524edaf284e5f6d7a8f451eeac332bc979.
Revert "revert all vidc changes"

This reverts commit c5e874a59fe206ffb949ce4810db13a0f4daacef.
Revert "Fix vidc decoder"

This reverts commit 19662992ad107bd48c700f3bdef2ede17fb27dec.
Revert "Revert "msm: vidc: Initialize kernel space stack variables""

This reverts commit 91b2340f5aea129b0b73ab8293c45c6b3881df59.
Revert "msm: vidc: Initialize kernel space stack variables"

This reverts commit c25304bb14f2332e585b53f651e6f018d8efeb0f.