arm64: dts: uniphier: Set SCSSI clock and reset IDs for each channel

Currently common clock and reset IDs were used, however, each clock and
reset ID should be used for each channel.

Fixes: 925c5c32 ("arm64: dts: uniphier: add SPI node for LD20, LD11 and PXs3")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>