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/Kconfig b/arch/arm/Kconfig
index cb7ec58..b5952ad 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -694,7 +694,7 @@
 	select DM
 	select OF_CONTROL
 
-config ARCH_MX8M
+config ARCH_IMX8M
 	bool "NXP i.MX8M platform"
 	select ARM64
 	select DM
@@ -1451,7 +1451,7 @@
 
 source "arch/arm/mach-imx/imx8/Kconfig"
 
-source "arch/arm/mach-imx/mx8m/Kconfig"
+source "arch/arm/mach-imx/imx8m/Kconfig"
 
 source "arch/arm/mach-imx/mxs/Kconfig"