msm: kgsl: Initialize CP engine before loading the zap shader

If CP is not initialized and zap shader loading fails the GMU IFPC state
machine is uninitialized which causes unwanted mess. Reverse the order
of CP_INIT and zap to handle the situation gracefully.

Change-Id: I062e4c7febd8ee11099bae1b58c579851a43e8bd
Signed-off-by: Urvashi Agrawal <urvaagra@codeaurora.org>