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/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile
index 0e515a4..02e8778 100644
--- a/arch/arm/cpu/armv7/Makefile
+++ b/arch/arm/cpu/armv7/Makefile
@@ -12,7 +12,7 @@
 obj-y	+= cpu.o cp15.o
 obj-y	+= syslib.o
 
-ifneq ($(CONFIG_AM43XX)$(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TEGRA)$(CONFIG_MX6)$(CONFIG_MX7)$(CONFIG_TI81XX)$(CONFIG_AT91FAMILY)$(CONFIG_ARCH_SUNXI)$(CONFIG_ARCH_SOCFPGA)$(CONFIG_LS102XA),)
+ifneq ($(CONFIG_AM43XX)$(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TEGRA)$(CONFIG_MX6)$(CONFIG_MX7)$(CONFIG_TI81XX)$(CONFIG_AT91FAMILY)$(CONFIG_ARCH_SUNXI)$(CONFIG_ARCH_SOCFPGA)$(CONFIG_ARCH_MX7ULP)$(CONFIG_LS102XA),)
 ifneq ($(CONFIG_SKIP_LOWLEVEL_INIT),y)
 obj-y	+= lowlevel_init.o
 endif
@@ -37,6 +37,7 @@
 obj-$(if $(filter mx5,$(SOC)),y) += mx5/
 obj-$(CONFIG_MX6) += mx6/
 obj-$(CONFIG_MX7) += mx7/
+obj-$(CONFIG_ARCH_MX7ULP) += mx7ulp/
 obj-$(CONFIG_RMOBILE) += rmobile/
 obj-$(if $(filter stv0991,$(SOC)),y) += stv0991/
 obj-$(CONFIG_ARCH_SUNXI) += sunxi/