Various minor cleanups for arm64 Amazon DTS
Cleanup arm64 DTS to remove dtschema validation errors.
* tag 'dt64-schema-5.10' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
arm64: dts: alpine: Fix GIC unit address
arm64: dts: alpine: Align GIC nodename with dtschema
Link: https://lore.kernel.org/r/20200911155509.1495-1-krzk@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>