arm64: dts: imx8: add mu5/6 node

Add mu5/6 for i.MX8QXP/QM, these two mu will be used for
communicating with general purpose Cortex-M4 cores.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8-ss-lsio.dtsi

@@ -141,6 +141,22 @@ lsio_mu4: mailbox@5d1f0000 {
 		status = "disabled";
 	};
 
+	lsio_mu5: mailbox@5d200000 {
+		reg = <0x5d200000 0x10000>;
+		interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
+		#mbox-cells = <2>;
+		power-domains = <&pd IMX_SC_R_MU_5A>;
+		status = "disabled";
+	};
+
+	lsio_mu6: mailbox@5d210000 {
+		reg = <0x5d210000 0x10000>;
+		interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>;
+		#mbox-cells = <2>;
+		power-domains = <&pd IMX_SC_R_MU_6A>;
+		status = "disabled";
+	};
+
 	lsio_mu13: mailbox@5d280000 {
 		reg = <0x5d280000 0x10000>;
 		interrupts = <GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;

arch/arm64/boot/dts/freescale/imx8qm-ss-lsio.dtsi

@@ -56,6 +56,14 @@ &lsio_mu4 {
 	compatible = "fsl,imx8-mu-scu", "fsl,imx8qm-mu", "fsl,imx6sx-mu";
 };
 
+&lsio_mu5 {
+	compatible = "fsl,imx8qm-mu", "fsl,imx6sx-mu";
+};
+
+&lsio_mu6 {
+	compatible = "fsl,imx8qm-mu", "fsl,imx6sx-mu";
+};
+
 &lsio_mu13 {
 	compatible = "fsl,imx8qm-mu", "fsl,imx6sx-mu";
 };

arch/arm64/boot/dts/freescale/imx8qxp-ss-lsio.dtsi

@@ -56,6 +56,14 @@ &lsio_mu4 {
 	compatible = "fsl,imx8-mu-scu", "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
 };
 
+&lsio_mu5 {
+	compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
+};
+
+&lsio_mu6 {
+	compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
+};
+
 &lsio_mu13 {
 	compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
 };