payloads/Makefile.inc: Add phony targets

Add 'nvramcui' target to make it easier to build and test.
Put both nvramcui & coreinfo targets into .PHONY because they
both exist as directories.

Change-Id: I9cf76785e69f3c8e47fe92f1b1648fd0f7a63c3e
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14481
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/payloads/Makefile.inc b/payloads/Makefile.inc
index 70a3b53..e68c2e7 100644
--- a/payloads/Makefile.inc
+++ b/payloads/Makefile.inc
@@ -34,7 +34,7 @@
 payloads/coreinfo/build/coreinfo.elf coreinfo:
 	$(MAKE) -C payloads/coreinfo defaultbuild
 
-payloads/nvramcui/nvramcui.elf:
+payloads/nvramcui/nvramcui.elf nvramcui:
 	$(MAKE) -C payloads/nvramcui
 
 clean-payloads:
@@ -46,4 +46,4 @@
 print-repo-info-payloads:
 	-$(foreach payload, $(PAYLOADS_LIST), $(MAKE) -C $(payload) print-repo-info 2>/dev/null; )
 
-.PHONY: clean-payloads distclean-payloads print-repo-info-payloads
+.PHONY: clean-payloads distclean-payloads print-repo-info-payloads nvramcui coreinfo