msm: kgsl: State based power code interaction

Make all interaction between kgsl code and kgsl power code state
oriented.  Function calls between the two should change the state
and checks involving power should be against the state.  As part
of this transition add the "AWARE" state.  In this state the GPU
is powered up but timers and interrupts are disabled to maintain
the current context.  This state is used for initialization and
error conditions.

Conflicts:
        drivers/gpu/msm/adreno.c
        drivers/gpu/msm/kgsl_pwrctrl.c

Change-Id: I743630fb14ad10f6f5e25fdb25d1ae23d85f0cbc
Signed-off-by: Lucille Sylvester <lsylvest@codeaurora.org>
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>