ARM: shmobile: r8a73a4: Add IRQC clock to device tree

Link the external IRQ controllers irqc0 and irqc1 to the IRQC module
clock, so they can be power managed using that clock.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[horms: corrected typo in changelog to refer to r8a73a4]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a73a4.dtsi

@@ -163,6 +163,7 @@ irqc0: interrupt-controller@e61c0000 {
 			     <0 29 IRQ_TYPE_LEVEL_HIGH>,
 			     <0 30 IRQ_TYPE_LEVEL_HIGH>,
 			     <0 31 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp4_clks R8A73A4_CLK_IRQC>;
 		power-domains = <&pd_c4>;
 	};
 
@@ -197,6 +198,7 @@ irqc1: interrupt-controller@e61c0200 {
 			     <0 55 IRQ_TYPE_LEVEL_HIGH>,
 			     <0 56 IRQ_TYPE_LEVEL_HIGH>,
 			     <0 57 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp4_clks R8A73A4_CLK_IRQC>;
 		power-domains = <&pd_c4>;
 	};
 
@@ -724,15 +726,16 @@ R8A73A4_CLK_CMT1
 		mstp4_clks: mstp4_clks@e6150140 {
 			compatible = "renesas,r8a73a4-mstp-clocks", "renesas,cpg-mstp-clocks";
 			reg = <0 0xe6150140 0 4>, <0 0xe615004c 0 4>;
-			clocks = <&main_div2_clk>, <&cpg_clocks R8A73A4_CLK_HP>,
+			clocks = <&main_div2_clk>, <&main_div2_clk>,
+				 <&cpg_clocks R8A73A4_CLK_HP>,
 				 <&cpg_clocks R8A73A4_CLK_HP>;
 			#clock-cells = <1>;
 			clock-indices = <
-				R8A73A4_CLK_IIC5 R8A73A4_CLK_IIC4
-				R8A73A4_CLK_IIC3
+				R8A73A4_CLK_IRQC R8A73A4_CLK_IIC5
+				R8A73A4_CLK_IIC4 R8A73A4_CLK_IIC3
 			>;
 			clock-output-names =
-				"iic5", "iic4", "iic3";
+				"irqc", "iic5", "iic4", "iic3";
 		};
 		mstp5_clks: mstp5_clks@e6150144 {
 			compatible = "renesas,r8a73a4-mstp-clocks", "renesas,cpg-mstp-clocks";

include/dt-bindings/clock/r8a73a4-clock.h

@@ -54,6 +54,7 @@
 #define R8A73A4_CLK_IIC3	11
 #define R8A73A4_CLK_IIC4	10
 #define R8A73A4_CLK_IIC5	9
+#define R8A73A4_CLK_IRQC	7
 
 /* MSTP5 */
 #define R8A73A4_CLK_THERMAL	22