mx7ulp: Add common plugin codes for mx7ulp

Add common plugin codes to call ROM's hwcnfg_setup and generate IVT2
header.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index ec09ef2..b6fd159 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -29,7 +29,7 @@
 
 config USE_IMXIMG_PLUGIN
 	bool "Use imximage plugin code"
-	depends on ARCH_MX7 || ARCH_MX6
+	depends on ARCH_MX7 || ARCH_MX6 || ARCH_MX7ULP
 	help
 	  i.MX6/7 supports DCD and Plugin. Enable this configuration
 	  to use Plugin, otherwise DCD will be used.