msm: kgsl: Profile scm call on a640v1

Log an error message if scm call takes more
than 2 seconds on a640v1. This helps to root
cause fence timeouts seen on a640v1.

Change-Id: If51c3c8c878f97a5b686be1f0c15bb5c6284dffe
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>