imx: add i.MX8M into Kconfig

Add i.MX8M into Kconfig, create a new folder mx8m
dedicated for i.MX8M.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Stefano Babic <sbabic@denx.de>

arch/arm/Kconfig

@@ -660,6 +660,12 @@ config ARCH_MESON
 	  targeted at media players and tablet computers. We currently
 	  support the S905 (GXBaby) 64-bit SoC.
 
+config ARCH_MX8M
+	bool "NXP i.MX8M platform"
+	select ARM64
+	select DM
+	select SUPPORT_SPL
+
 config ARCH_MX25
 	bool "NXP MX25"
 	select CPU_ARM926EJS
@@ -1254,13 +1260,15 @@ source "arch/arm/cpu/armv7/ls102xa/Kconfig"
 
 source "arch/arm/mach-imx/mx2/Kconfig"
 
-source "arch/arm/mach-imx/mx7ulp/Kconfig"
+source "arch/arm/mach-imx/mx5/Kconfig"
+
+source "arch/arm/mach-imx/mx6/Kconfig"
 
 source "arch/arm/mach-imx/mx7/Kconfig"
 
-source "arch/arm/mach-imx/mx6/Kconfig"
+source "arch/arm/mach-imx/mx7ulp/Kconfig"
 
-source "arch/arm/mach-imx/mx5/Kconfig"
+source "arch/arm/mach-imx/mx8m/Kconfig"
 
 source "arch/arm/mach-omap2/Kconfig"
 

arch/arm/Makefile

@@ -95,11 +95,11 @@ libs-y += arch/arm/cpu/
 libs-y += arch/arm/lib/
 
 ifeq ($(CONFIG_SPL_BUILD),y)
-ifneq (,$(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_MX35)$(filter $(SOC), mx25 mx5 mx6 mx7 mx35))
+ifneq (,$(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_MX35)$(filter $(SOC), mx25 mx5 mx6 mx7 mx35 mx8m))
 libs-y += arch/arm/mach-imx/
 endif
 else
-ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx7 mx7ulp mx31 mx35 mxs vf610))
+ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx7 mx7ulp mx31 mx35 mxs mx8m vf610))
 libs-y += arch/arm/mach-imx/
 endif
 endif

arch/arm/mach-imx/mx8m/Kconfig

@@ -0,0 +1,10 @@
+if ARCH_MX8M
+
+config MX8M
+	bool
+	select ROM_UNIFIED_SECTIONS
+
+config SYS_SOC
+	default "mx8m"
+
+endif