ARM: dts: uniphier: sync Device Tree with Linux

Sync with the latest kernel.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/dts/uniphier-pxs2-gentil.dts b/arch/arm/dts/uniphier-pxs2-gentil.dts
index a98e758..0a6d46c 100644
--- a/arch/arm/dts/uniphier-pxs2-gentil.dts
+++ b/arch/arm/dts/uniphier-pxs2-gentil.dts
@@ -71,7 +71,7 @@
 	u-boot,dm-pre-reloc;
 };
 
-&mio_clk {
+&sd_clk {
 	u-boot,dm-pre-reloc;
 };