Revert "msm: vidc: Remove QCOM keyword from buffer flag"

This reverts commit b1b6c65d.

The commit b1b6c65d had non-complaint
keywords, hence reverting the same.

Change-Id: Ibcaaa4b5e696fd518a171d70dedc361e5672c756
Signed-off-by: Shubham Gupta <shubgupt@codeaurora.org>