silence config step commands display during MAKEALL builds

[u-boot next]$ ./MAKEALL 83xx
awk '(NF && $1 !~ /^#/) { print $1 ": " $1 "_config; $(MAKE)" }' boards.cfg > .boards.depend
Configuring for ve8313 board...

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

MAKEALL

@@ -727,7 +727,7 @@ build_target() {
 	target=$1
 
 	${MAKE} distclean >/dev/null
-	${MAKE} ${target}_config
+	${MAKE} -s ${target}_config
 
 	${MAKE} ${JOBS} all 2>&1 >${LOG_DIR}/$target.MAKELOG \
 				| tee ${LOG_DIR}/$target.ERR