msm: vidc: Propagate time stamp information even filled length is zero

Few msm targets do not have video concealment support,
As concealment not happening for corrupted frames,
filled length will be zero. But video clients are expecting
time stamp information for corrupted frames as well.
Remove filled length verification to propagate timestamp information.

Change-Id: Ic3d204189f9ecb812705f501f269c085c8bbe34f
Signed-off-by: Srinu Gorle <sgorle@codeaurora.org>
CRs-Fixed: 1041031