add nvramcui as a secondary payload

Change-Id: Ie38a358ebd2d040ce32b3eeaeb664c568d4dc51e
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Reviewed-on: https://review.coreboot.org/14378
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)

payloads/Kconfig

@@ -77,5 +77,13 @@ config MEMTEST_SECONDARY_PAYLOAD
 	  Memtest86+ can be loaded as a secondary payload under SeaBIOS, GRUB,
 	  or any other payload that can load additional payloads.
 
+config NVRAMCUI_SECONDARY_PAYLOAD
+	bool "Load nvramcui as a secondary payload"
+	default n
+	depends on ARCH_X86
+	help
+	  nvramcui can be loaded as a secondary payload under SeaBIOS, GRUB,
+	  or any other payload that can load additional payloads.
+
 endmenu # "Secondary Payloads"
 endmenu