Fix warnings reported when built with W=1, by DTC 1.4.2 or later:
Node /memory has a reg or ranges property, but no unit name
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Since commit 26b09c022a ("ARM: uniphier: move SBC and Support Card
init code to U-Boot proper"), SPL does not need pin-mux settings for
the System Bus.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>