misc: imx: S400_API: Move S400 MU and API to a common place

Since iMX9 uses S401 which shares the API with iMX8ULP. So move S400
MU driver and API to a common place and selected by CONFIG_IMX_SENTINEL

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2802b9b..d290194 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -905,6 +905,8 @@
 	select OF_CONTROL
 	select SUPPORT_SPL
 	select GPIO_EXTRA_HEADER
+	select MISC
+	select IMX_SENTINEL
 	imply CMD_DM
 	imply DM_EVENT
 
@@ -914,6 +916,8 @@
 	select DM
 	select MACH_IMX
 	select SUPPORT_SPL
+	select MISC
+	select IMX_SENTINEL
 	imply CMD_DM
 	imply DM_EVENT