misc: imx8: scu: add i.MX8QM support

According to IMX8QXP/8QM config option, choose the clk/iomuxc
compatible.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/misc/imx8/scu.c b/drivers/misc/imx8/scu.c
index 1b9c49c..9ec0045 100644
--- a/drivers/misc/imx8/scu.c
+++ b/drivers/misc/imx8/scu.c
@@ -219,11 +219,21 @@
 	int ret;
 	struct udevice *child;
 	int node;
+	char *clk_compatible, *iomuxc_compatible;
+
+	if (IS_ENABLED(CONFIG_IMX8QXP)) {
+		clk_compatible = "fsl,imx8qxp-clk";
+		iomuxc_compatible = "fsl,imx8qxp-iomuxc";
+	} else if (IS_ENABLED(CONFIG_IMX8QM)) {
+		clk_compatible = "fsl,imx8qm-clk";
+		iomuxc_compatible = "fsl,imx8qm-iomuxc";
+	} else {
+		return -EINVAL;
+	}
 
 	debug("%s(dev=%p)\n", __func__, dev);
 
-	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1,
-					     "fsl,imx8qxp-clk");
+	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, clk_compatible);
 	if (node < 0)
 		panic("No clk node found\n");
 
@@ -234,7 +244,7 @@
 	plat->clk = child;
 
 	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1,
-					     "fsl,imx8qxp-iomuxc");
+					     iomuxc_compatible);
 	if (node < 0)
 		panic("No iomuxc node found\n");