app: boards: Add dts and config overlay for imx8mp cm7

This enables host_dma, sdma3 and sai3 nodes and their respective
drivers.

Also, we enable CONFIG_ROMSTART_RELOCATION_ROM option in order to put
romstart section into ITCM (because M7 gets its first instruction at
adress 0 in ITCM).

Note that we temporarily disable COMP_ASRC because there is a conflict
between NXP HAL and SOF ASRC headers.

e.g NXP HAL defines:

 #define ASRC ((ASRC_Type *)ASRC_BASE)

and ASRC modules uses:

 #if SOF_USE_MIN_HIFI(5, ASRC)

which results in a compilation error.

Signed-off-by: Daniel Baluta <[email protected]>

Author: dbaluta

app/boards/imx8mp_evk_mimx8ml8_m7_ddr.conf

@@ -0,0 +1,15 @@
+CONFIG_IMX8M_CM7=y
+CONFIG_ZEPHYR_NATIVE_DRIVERS=y
+CONFIG_CACHE_MANAGEMENT=y
+CONFIG_NOCACHE_MEMORY=y
+CONFIG_DYNAMIC_INTERRUPTS=y
+CONFIG_SHARED_INTERRUPTS=y
+CONFIG_CLOCK_CONTROL_FIXED_RATE_CLOCK=y
+CONFIG_ROMSTART_RELOCATION_ROM=y
+CONFIG_DMA_NXP_SOF_HOST_DMA_ALIGN=32
+CONFIG_DMA=y
+CONFIG_DMA_NXP_SDMA=y
+CONFIG_DAI_NXP_SAI=y
+CONFIG_SAI_HAS_MCLK_CONFIG_OPTION=y
+CONFIG_COMP_ASRC=n
+

app/boards/imx8mp_evk_mimx8ml8_m7_ddr.overlay

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2026 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	host_dma: dma {
+		compatible = "nxp,sof-host-dma";
+		dma-channels = <32>;
+		#dma-cells = <0>;
+	};
+};
+
+&sdma3 {
+	status = "okay";
+};
+
+&sai3 {
+	pinctrl-0 = <&sai3_default>;
+	pinctrl-names = "default";
+	rx-fifo-watermark = <64>;
+	tx-fifo-watermark = <64>;
+	fifo-depth = <96>;
+	rx-sync-mode = <1>;
+	status = "okay";
+};