msm: kgsl: Sync up gmu idle timeout XO clock

Add code to synchronize GMU wait for idle loop between
CPU and GMU time stamps.

Signed-off-by: Oleg Perelet <operelet@codeaurora.org>
Change-Id: Ief87e6c7f35b9478d1aaad36746cebd44661d14b
Signed-off-by: Urvashi Agrawal <urvaagra@codeaurora.org>