kbuild: do not pass $(objtree) to scripts/mkmakefile

Since $(objtree) is always '.', it is not useful to pass it to
scripts/mkmakefile.  I assume nobody wants to run this script directly.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

Makefile

@@ -494,7 +494,7 @@ PHONY += outputmakefile
 outputmakefile:
 ifneq ($(KBUILD_SRC),)
 	$(Q)ln -fsn $(srctree) source
-	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) $(objtree)
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
 endif
 
 ifeq ($(cc-name),clang)

scripts/mkmakefile

@@ -6,19 +6,18 @@
 
 # Usage
 # $1 - Kernel src directory
-# $2 - Output directory
 
 # Only overwrite automatically generated Makefiles
 # (so we do not overwrite kernel Makefile)
-if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
+if test -e Makefile && ! grep -q Automatically Makefile
 then
 	exit 0
 fi
 if [ "${quiet}" != "silent_" ]; then
-	echo "  GEN     $2/Makefile"
+	echo "  GEN     Makefile"
 fi
 
-cat << EOF > $2/Makefile
+cat << EOF > Makefile
 # Automatically generated by $0: don't edit
 
 lastword = \$(word \$(words \$(1)),\$(1))