kbuild: use shorten logs for misc targets

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/arch/blackfin/cpu/Makefile b/arch/blackfin/cpu/Makefile
index 426292f..cfbcd31 100644
--- a/arch/blackfin/cpu/Makefile
+++ b/arch/blackfin/cpu/Makefile
@@ -37,5 +37,9 @@
 endif
 
 CPPFLAGS_init.lds := -ansi
+
+quiet_cmd_link_init = LD      $@
+      cmd_link_init = $(LD) $(LDFLAGS) -T $^ -o $@
 $(obj)/init.elf: $(obj)/init.lds $(obj)/init.o $(obj)/initcode.o
-	$(LD) $(LDFLAGS) -T $^ -o $@
+	$(call if_changed,link_init)
+targets += init.lds init.o