imx: mx7ulp: Add mx7ulp to Kconfig

i.MX7ULP is a new series SoC which has different architecture
from previous i.MX platforms. Create a new cpu folder for it,
and add it to Kconfig.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by : Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 20434dc..e8cdefa 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -580,6 +580,11 @@
 	  targeted at media players and tablet computers. We currently
 	  support the S905 (GXBaby) 64-bit SoC.
 
+config ARCH_MX7ULP
+        bool "NXP MX7ULP"
+        select CPU_V7
+	select ROM_UNIFIED_SECTIONS
+
 config ARCH_MX7
 	bool "Freescale MX7"
 	select CPU_V7
@@ -1158,6 +1163,8 @@
 
 source "arch/arm/cpu/armv7/ls102xa/Kconfig"
 
+source "arch/arm/cpu/armv7/mx7ulp/Kconfig"
+
 source "arch/arm/cpu/armv7/mx7/Kconfig"
 
 source "arch/arm/cpu/armv7/mx6/Kconfig"