ARM: dts: msm: Add context aware dcvs properties for msm8937

Add properties to enable use of context aware dcvs and
setting target power level and busy penalty.

Change-Id: Ic77da37d89353b3b1025bb141ae099e4092f084c
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>
Signed-off-by: Divya Ponnusamy <pdivya@codeaurora.org>