msm: platsmp: Update Krait power on boot sequence for MSM8962

MSM8962 has dedicated power rails for each Krait CPU.
Call on the SPM API msm_spm_turn_on_cpu_rail to ensure
each rail is powered on prior to executing the KPSS reset sequence.

Change-Id: I72bc826a2ef3a16676073d96d7c0337500f8efe2
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>