Use timestamp from userspace instead of incrementing context's last issued timestamp. This allows userspace to defer submissions to KGSL. Change-Id: I2a104f97420f73dac3bbd23464e92e6ea9d92869 Signed-off-by: Vijay Krishnamoorthy <adivarah@codeaurora.org> Signed-off-by: Rajeev Kulkarni <krajeev@codeaurora.org>