TDA4VM: TDA4VM-OpenVx-Capture-image-gtc timestamp max value is max(uint32) but not max(uint64_t)

hi:

we use sdk 7.3, use default gtc timestamp in capture node.

The default timestamp get function tivxPlatformGetTimeInUsecs() return uint64 type value. However, timestamp get by tivxCaptureGetObjDesc() is uint32.

When we get timestamp by VxQueryReference，the max value is 0xFFFFFFF(4,294,967,295), and then to be 0.