arm: dts: msm: Update SAW2_CFG

Programming saw2_cfg to 0 on A7 cores decreases the window
for the interrupt to slip through as it increases SPM delay.
Modify for such a change on msm8226 and msm8610.

Change-Id: I46909e3cc4c571037280d6d18d1bb76ac5b98744
Signed-off-by: Priyanka Mathur <pmathur@codeaurora.org>