Merge tag 'xgene-dts-for-v4.6-part1' of https://github.com/AppliedMicro/xgene-next into next/dt64

Merge "First part of X-Gene DT changes queued for v4.6" from Duc Dang:

This patch set includes:
+ A change in compatible string of X-Gene v2 SoC
PLL DT node to reflect the v2 hardware
+ Update DT fields for X-Gene v1 and v2 standby
GPIO controllers
+ Update declaration of power button GPIO for
X-Gene v1 and X-Gene v2 platforms

* tag 'xgene-dts-for-v4.6-part1' of https://github.com/AppliedMicro/xgene-next:
  arm64: dts: apm: Update GPIO to control power-off on X-Gene v2 platforms
  arm64: dts: apm: Update GPIO standby controller DT node for X-Gene v2 platforms
  arm64: dts: apm: Update GPIO to control power-off on X-Gene v1 platforms
  arm64: dts: apm: Update X-Gene standby GPIO controller DTS entries
  arm64: dts: apm: Update Merlin DT PCP PLL clock node for v2 hardware