VT: Update payload value at runtime for SFR

payload type might be re-assigned if there is a modification
in ongoing session.

We need to provide a new payload type in above case.

Merged-in: I9e19a7bb3e0c7849cbb244fd3a3221ce79c4e56d
Change-Id: I9e19a7bb3e0c7849cbb244fd3a3221ce79c4e56d
Signed-off-by: Somraj Mani <som.mani@samsung.com>