ARM: dts: uniphier: add device nodes for MIO control block

This block provides clock and reset control for MIO (Media I/O)
hardware blocks such as USB2.0, SD card, eMMC, etc.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/dts/uniphier-common32.dtsi b/arch/arm/dts/uniphier-common32.dtsi
index 43e5bea..59511bd 100644
--- a/arch/arm/dts/uniphier-common32.dtsi
+++ b/arch/arm/dts/uniphier-common32.dtsi
@@ -74,6 +74,12 @@
 			reg = <0x58c00000 0x400>, <0x59800000 0x2000>;
 		};
 
+		mio: mioctrl@59810000 {
+			/* specify compatible in each SoC DTSI */
+			reg = <0x59810000 0x800>;
+			#clock-cells = <1>;
+		};
+
 		peri: perictrl@59820000 {
 			/* specify compatible in each SoC DTSI */
 			reg = <0x59820000 0x200>;