arm/dt: msm8610: Update SPM configuration

Update SPM sequence for 8610 as per latest HPG. Also
remove the sequence corresponding to L2 GDHS as it is
not supported on the hardware yet.

Change-Id: I9e721490c0e5e98c8f97e0e8af43b8340f33b046
Signed-off-by: Priyanka Mathur <pmathur@codeaurora.org>