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/mach-imx/imxrt/Kconfig b/arch/arm/mach-imx/imxrt/Kconfig
new file mode 100644
index 0000000..96ad2e9
--- /dev/null
+++ b/arch/arm/mach-imx/imxrt/Kconfig
@@ -0,0 +1,13 @@
+if ARCH_IMXRT
+
+config IMXRT
+	bool
+
+config IMXRT1050
+	bool
+	select IMXRT
+
+config SYS_SOC
+	default "imxrt"
+
+endif