msm: kgsl: Relax CPU latency requirements to save power

Relaxing the CPU latency requirement by about 500 us won't significantly
hurt graphics performance. On the flip side, most SoCs have many idle
levels just below 1000 us in latency, with deeper idle levels having
latencies in excess of 2000 us. Changing the latency requirement to
1000 us allows most SoCs to use their deepest sub-1000-us idle state
while the GPU is active.

Additionally, since the lpm driver has been update to allow power levels
with latencies equal to target latencies, change the wakeup latency from
101 to 100 for clarity.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>