libpayload: Don't use default path for kconfig

libpayload's kconfig is totally incompatible with other kconfig versions,
today. Using other versions just doesn't work any more, so don't use the
overridable $(obj)/util/kconfig path. Choose a path that reflects the
incompatibility: $(obj)/util/lp_kconfig, instead.

This whole every-(sub)project-has-it's-own-patched-kconfig-version makes
me really, really sad :'-(

Change-Id: I964772f3323dc20aa7c1cc26a384a2fbca1dbb5e
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: http://review.coreboot.org/7061
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/payloads/libpayload/Makefile b/payloads/libpayload/Makefile
index d84b63b..0b2f109 100644
--- a/payloads/libpayload/Makefile
+++ b/payloads/libpayload/Makefile
@@ -48,7 +48,7 @@
 export srck := $(top)/util/kconfig
 export obj ?= build
 export objutil ?= $(obj)/util
-export objk := $(objutil)/kconfig
+export objk := $(objutil)/lp_kconfig
 
 
 export KCONFIG_AUTOHEADER := $(obj)/config.h
@@ -272,7 +272,7 @@
 
 endif
 
-$(shell mkdir -p $(obj) $(objutil)/kconfig/lxdialog $(additional-dirs) $(alldirs))
+$(shell mkdir -p $(obj) $(objk)/lxdialog $(additional-dirs) $(alldirs))
 
 cscope:
 	cscope -bR