ARM: shmobile: sh73a0 dtsi: Set control-parent for all irqpin nodes

The sh73a0 INTC can't mask interrupts properly most likely due to a
hardware bug. Set the control-parent property to delegate masking to the
parent interrupt controller.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/sh73a0.dtsi

@@ -94,6 +94,7 @@ irqpin0: irqpin@e6900000 {
 			      0 6 IRQ_TYPE_LEVEL_HIGH
 			      0 7 IRQ_TYPE_LEVEL_HIGH
 			      0 8 IRQ_TYPE_LEVEL_HIGH>;
+		control-parent;
 	};
 
 	irqpin1: irqpin@e6900004 {
@@ -133,6 +134,7 @@ irqpin2: irqpin@e6900008 {
 			      0 22 IRQ_TYPE_LEVEL_HIGH
 			      0 23 IRQ_TYPE_LEVEL_HIGH
 			      0 24 IRQ_TYPE_LEVEL_HIGH>;
+		control-parent;
 	};
 
 	irqpin3: irqpin@e690000c {
@@ -152,6 +154,7 @@ irqpin3: irqpin@e690000c {
 			      0 30 IRQ_TYPE_LEVEL_HIGH
 			      0 31 IRQ_TYPE_LEVEL_HIGH
 			      0 32 IRQ_TYPE_LEVEL_HIGH>;
+		control-parent;
 	};
 
 	i2c0: i2c@e6820000 {