imx: rename mx8m,MX8M to imx8m,IMX8M

Rename mx8m,MX8M to imx8m,IMX8M

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jon Nettleton <jon@solid-run.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
new file mode 100644
index 0000000..98d79c3
--- /dev/null
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -0,0 +1,10 @@
+if ARCH_IMX8M
+
+config IMX8M
+	bool
+	select ROM_UNIFIED_SECTIONS
+
+config SYS_SOC
+	default "imx8m"
+
+endif