msm: kgsl: Log correct fence pointer when cmdbatch timer expires

When cmdbatch timer expires, fence address at log entry is incorrect.
Hence sync_fence & kgsl logs don't match for timed out fence pointer.
This is inconvenience to debug fence timeouts. Log correct fence
address if valid.

Change-Id: I7cead43989d5551e9b2d5f6eefb8baacd37bd69b
Signed-off-by: Ananta Kishore K <akollipa@codeaurora.org>