msm: kgsl: Always add a start identifier to a command sequence

Add command sequence start identifier for commands submitted from
kgsl as well since this will be used during recovery. We will just
try recovery and not try to differentiate between commands from
kgsl or from user space.

Change-Id: I433e9f2786268c6c51a446e3c7cf9eb5fd429197
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>