ASoC: SOF: imx: Add i.MX8ULP HW support

This adds skeleton support for the audio DSP hardware found on
NXP i.MX8ULP platform.

On i.MX8ULP resources (clocks, power, etc) are managed by the
System Integration Module in LPAV domain and XRDC which is handled
by arm trusted firmware.
Signed-off-by: Zhang Peng <peng.zhang_8@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/1660787634-28550-2-git-send-email-shengjiu.wang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/imx/Kconfig

@@ -41,4 +41,13 @@ config SND_SOC_SOF_IMX8M
 	  Say Y if you have such a device.
 	  If unsure select "N".
 
+config SND_SOC_SOF_IMX8ULP
+	tristate "SOF support for i.MX8ULP"
+	depends on IMX_DSP
+	select SND_SOC_SOF_IMX_COMMON
+	help
+	  This adds support for Sound Open Firmware for NXP i.MX8ULP platforms.
+	  Say Y if you have such a device.
+	  If unsure select "N".
+
 endif ## SND_SOC_SOF_IMX_TOPLEVEL

sound/soc/sof/imx/Makefile

 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
 snd-sof-imx8-objs := imx8.o
 snd-sof-imx8m-objs := imx8m.o
+snd-sof-imx8ulp-objs := imx8ulp.o
 
 snd-sof-imx-common-objs := imx-common.o
 
 obj-$(CONFIG_SND_SOC_SOF_IMX8) += snd-sof-imx8.o
 obj-$(CONFIG_SND_SOC_SOF_IMX8M) += snd-sof-imx8m.o
+obj-$(CONFIG_SND_SOC_SOF_IMX8ULP) += snd-sof-imx8ulp.o
 obj-$(CONFIG_SND_SOC_SOF_IMX_COMMON) += imx-common.o