arm64: dts: imx8mp: add HDMI irqsteer

The HDMI irqsteer is a secondary interrupt controller within the HDMI
subsystem that maps all HDMI peripheral IRQs into a single upstream
IRQ line.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Adam Ford <aford173@gmail.com>
Tested-by: Marek Vasut <marex@denx.de>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Tommaso Merciai <tomm.merciai@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp.dtsi

@@ -1927,6 +1927,19 @@ hdmi_blk_ctrl: blk-ctrl@32fc0000 {
 						     "hdcp", "hrv";
 				#power-domain-cells = <1>;
 			};
+
+			irqsteer_hdmi: interrupt-controller@32fc2000 {
+				compatible = "fsl,imx-irqsteer";
+				reg = <0x32fc2000 0x1000>;
+				interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
+				interrupt-controller;
+				#interrupt-cells = <1>;
+				fsl,channel = <1>;
+				fsl,num-irqs = <64>;
+				clocks = <&clk IMX8MP_CLK_HDMI_APB>;
+				clock-names = "ipg";
+				power-domains = <&hdmi_blk_ctrl IMX8MP_HDMIBLK_PD_IRQSTEER>;
+			};
 		};
 
 		pcie: pcie@33800000 {