imx: Add basic support for the NXP IMXRT10xx SoC family

Add i.IMXRT family basic support.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8f95077..ee3ca8d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -807,6 +807,14 @@
 	select SUPPORT_SPL
 	imply CMD_DM
 
+config ARCH_IMXRT
+	bool "NXP i.MXRT platform"
+	select CPU_V7M
+	select DM
+	select DM_SERIAL
+	select SUPPORT_SPL
+	imply CMD_DM
+
 config ARCH_MX23
 	bool "NXP i.MX23 family"
 	select CPU_ARM926EJS
@@ -1732,6 +1740,8 @@
 
 source "arch/arm/mach-imx/imx8m/Kconfig"
 
+source "arch/arm/mach-imx/imxrt/Kconfig"
+
 source "arch/arm/mach-imx/mxs/Kconfig"
 
 source "arch/arm/mach-omap2/Kconfig"