Currently SW writes a magic number in the tx completion
ring descriptor after reaping from the ring. This magic
number is used to determine, if the HP of the srng has been
updated without the contents of the ring descriptor has been
written.
There were cases of such stale entries observed and as a SW
workaround, add a logic to wait for a specific timeout for
the contents of the ring descriptor to be updated before
moving on to process subsequent ring entries.
Change-Id: I17c0dc0ac55ca81dee3c0825ce934d60ccb1a720
CRs-Fixed: 3648443
ab914e6f3e