ARM: dts: msm: Update Venus QOS settings for SDM660

QOS setting defines the priority and privilege levels
for VCodec hardware and the CPU. Enable the privilege
and priority for Core0 to Core5. Set the priority as
P2 for Core0 and rest as P1. Set the privilege for
Core0 as P2 and rest as P1.

CRs-Fixed: 1103405
Signed-off-by: Manikanta Sivapala <msivap@codeaurora.org>
Change-Id: I6b3f13b55bc153f81672fe82395e1fb6ee1ea333