ais: increase CCI timeout value to 600 msec

On some ADP board, after writing CCI command to sensor, msm_cci_wait
timeout issue happens sometimes during b2b stress testing.

All the error cases indicate needing 510 msec to get completion from irq,
so change the timeout value from 500 msec to 600 msec.

CRs-fixed: 2052210

Change-Id: Ie70a86de6b2d7eab823ad700be5ee748a3f5e800
Signed-off-by: Andy Sun <bins@codeaurora.org>