p4wifi: sync with pershoot

-p4wifi: update nvcam from 7510's XWLPC
-Revert "p4wifi: remove audio_policy.tegra"
p4vzw: sync with pershoot

-Revert "p4vzw: remove audio_policy.tegra"
p4tmo: sync with pershoot

-Revert "p4tmo: remove audio_policy.tegra"
p4: sync with pershoot

-p4: update hwc, nvcam, video and ril from 7500's XWLP9
-Revert "p4: remove audio_policy.tegra"
p3: sync with pershoot

-p3: update ril from 7500's XWLP9
-Revert "p3: remove audio_policy.tegra"