arm: imx: add i.MX8ULP basic Kconfig option

Add i.MX8ULP related basic Kconfig option, which will be used later.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/imx8ulp/Kconfig b/arch/arm/mach-imx/imx8ulp/Kconfig
new file mode 100644
index 0000000..167dbb3
--- /dev/null
+++ b/arch/arm/mach-imx/imx8ulp/Kconfig
@@ -0,0 +1,16 @@
+if ARCH_IMX8ULP
+
+config IMX8ULP
+	bool
+	select ARMV8_SPL_EXCEPTION_VECTORS
+
+config SYS_SOC
+	default "imx8ulp"
+
+choice
+	prompt "i.MX8ULP board select"
+	optional
+
+endchoice
+
+endif