ARM: dts: msm: Add SPM PLL management support to MSM8994v2

8994v2 is able to manage CPU PLL's from SAW when entering L2 and CCI power
collapse. Add additional spm sequence commands for spm pll management. Also
add a property to indicate the same to the driver.

Change-Id: I575a7a2d5a7451663a551d81632152de2cc643aa
Signed-off-by: Karthik Parsha <kparsha@codeaurora.org>