linux-phytec-fsl

arm64: dts: uniphier: match DT names to other projects and documents

All UniPhier device trees have the common prefix "uniphier-", so
"ph1-" is just making names longer.  Recent documents and other
projects are not using PH1- prefixes any more.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>