arm64: dts: uniphier: fix gpio-ranges property of PXs3 SoC

This is probably a copy-paste mistake.  The gpio-ranges of PXs3 is
different from that of LD20.

Fixes: 277b51e7

 ("arm64: dts: uniphier: add GPIO controller nodes")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>