ARM: dts: msm: Changing the pet timeout as per granularity limit

With the new timer implementation,there is extra granularity for
each level and hence changing the granularity for pet-time

* HZ  100
* Level Offset  Granularity       Range
*  0	   0         10 ms        0 ms - 630 ms
*  1	  64         80 ms        640 ms - 5110 ms (640ms - ~5s)
*  2	 128        640 ms        5120 ms - 40950 ms (~5s - ~40s).

Change-Id: I945b2a40aaaffe45ee8e030d5c92a17a73272831
Signed-off-by: Mahesh Reddy Kodidi <mahreddy@codeaurora.org>