make: Remove 'build-all' rule

It is not needed, because the 'all' rule does the same.
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Makefile

@@ -6,7 +6,7 @@ BUILD_DIR=$(CURDIR)
 # All following code might depend on configuration variables
 ifneq ($(wildcard config-host.mak),)
 # Put the all: rule here so that config-host.mak can contain dependencies.
-all: build-all
+all:
 include config-host.mak
 include $(SRC_PATH)/rules.mak
 config-host.mak: $(SRC_PATH)/configure
@@ -31,7 +31,7 @@ Makefile: ;
 configure: ;
 
 .PHONY: all clean cscope distclean dvi html info install install-doc \
-	pdf recurse-all speed tar tarbin test build-all
+	pdf recurse-all speed tar tarbin test
 
 $(call set-vpath, $(SRC_PATH))
 
@@ -82,7 +82,7 @@ defconfig:
 
 -include config-all-devices.mak
 
-build-all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all
+all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all
 
 config-host.h: config-host.h-timestamp
 config-host.h-timestamp: config-host.mak