boot/barebox: use the generic help rules

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[Thomas: don't use the helper.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Makefile

@@ -941,10 +941,6 @@ help:
 		@echo $(sep) \
 		@echo '$($(p)_NAME):' $(sep) \
 		$($(p)_HELP_CMDS)$(sep))
-ifeq ($(BR2_TARGET_BAREBOX),y)
-	@echo '  barebox-menuconfig     - Run barebox menuconfig'
-	@echo '  barebox-savedefconfig  - Run barebox savedefconfig'
-endif
 	@echo
 	@echo 'Documentation:'
 	@echo '  manual                 - build manual in all formats'

boot/barebox/barebox/barebox.mk

@@ -4,5 +4,10 @@
 #
 ################################################################################
 
+define BAREBOX_HELP_CMDS
+	@echo '  barebox-menuconfig     - Run barebox menuconfig'
+	@echo '  barebox-savedefconfig  - Run barebox savedefconfig'
+endef
+
 # Instantiate the barebox package
 $(eval $(barebox-package))