dt: mimxrt798s/cm33_cpu0: Instantiate MU4

Instantiate the MU4 peripheral in SoC's DT. Enable it in board's DT.
Switch variant of the fsl_mu driver included.

The MU4 peripheral is used for IPC with the mimxrt798s/hifi4 domain.

Signed-off-by: Vit Stanicek <[email protected]>

Author: VitekST

boards/nxp/mimxrt700_evk/mimxrt700_evk_mimxrt798s_cm33_cpu0.dts

@@ -279,3 +279,7 @@ p3t1755dp_ard_i2c_interface: &flexcomm8_lpi2c8 {};
 &dsp {
 	status = "okay";
 };
+
+&mbox4 {
+	status = "okay";
+};

dts/arm/nxp/nxp_rt7xx_cm33_cpu0.dtsi

@@ -1221,6 +1221,18 @@
 		interrupts = <17 0>;
 		status = "disabled";
 	};
+
+	mbox4: mbox@189000 {
+		#mbox-cells = <1>;
+
+		compatible = "nxp,mbox-imx-mu";
+		reg = <0x189000 0x1000>;
+
+		interrupts = <31 0>;
+		rx-channels = <4>;
+
+		status = "disabled";
+	};
 };
 
 &systick {

modules/hal_nxp/mcux/mcux-sdk-ng/drivers/drivers.cmake

@@ -184,7 +184,7 @@ elseif(CONFIG_CPU_CORTEX_A)
 endif()
   set_variable_ifdef(CONFIG_HAS_MCUX_XCACHE		CONFIG_MCUX_COMPONENT_driver.cache_xcache)
 
-if((${MCUX_DEVICE} MATCHES "MIMX9596") OR (${MCUX_DEVICE} MATCHES "MIMX8UD7") OR (${MCUX_DEVICE} MATCHES "MIMXRT118") OR (CONFIG_SOC_MIMX94398))
+if((${MCUX_DEVICE} MATCHES "MIMX9596") OR (${MCUX_DEVICE} MATCHES "MIMX8UD7") OR (${MCUX_DEVICE} MATCHES "MIMXRT118") OR (CONFIG_SOC_MIMX94398) OR (CONFIG_SOC_MIMXRT798S))
   set_variable_ifdef(CONFIG_IPM_IMX	CONFIG_MCUX_COMPONENT_driver.mu1)
   set_variable_ifdef(CONFIG_MBOX_NXP_IMX_MU	CONFIG_MCUX_COMPONENT_driver.mu1)
 else()