ARM: dts: msm: Turn on power aware scheduling for msm8996

This feature allows the scheduler to look at power data for the
hardware it is operating on in order to make more power efficient
scheduling decisions. Turn on the feature for msm8996 since power
data is now available.

Change-Id: I821d7564ccb3b67cbd08b1975135784888071288
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>