Makefile: simplify handling of build target names

Instead of stripping the "_config" part from the make target names in
each call of the "mkconfig" script let this script strip the string.

This prepares the ground for forther simplification of the top level
Makefile.

Signed-off-by: Wolfgang Denk <wd@denx.de>

mkconfig

@@ -16,13 +16,13 @@ while [ $# -gt 0 ] ; do
 	case "$1" in
 	--) shift ; break ;;
 	-a) shift ; APPEND=yes ;;
-	-n) shift ; BOARD_NAME="${1%%_config}" ; shift ;;
+	-n) shift ; BOARD_NAME="${1%_config}" ; shift ;;
 	-t) shift ; TARGETS="`echo $1 | sed 's:_: :g'` ${TARGETS}" ; shift ;;
 	*)  break ;;
 	esac
 done
 
-[ "${BOARD_NAME}" ] || BOARD_NAME="$1"
+[ "${BOARD_NAME}" ] || BOARD_NAME="${1%_config}"
 
 [ $# -lt 4 ] && exit 1
 [ $# -gt 6 ] && exit 1
@@ -102,7 +102,7 @@ done
 cat << EOF >> config.h
 #define CONFIG_BOARDDIR board/$BOARDDIR
 #include <config_defaults.h>
-#include <configs/$1.h>
+#include <configs/${BOARDNAME}.h>
 #include <asm/config.h>
 EOF