objtool: Properly support make V=1

The Q variable was being used but never correctly set up. Add the
setting up and use in place of @.
Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20230126190606.40739-3-irogers@google.comSigned-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

tools/objtool/Makefile

@@ -45,6 +45,12 @@ CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
 AWK = awk
 MKDIR = mkdir
 
+ifeq ($(V),1)
+  Q =
+else
+  Q = @
+endif
+
 BUILD_ORC := n
 
 ifeq ($(SRCARCH),x86)
@@ -56,18 +62,18 @@ export srctree OUTPUT CFLAGS SRCARCH AWK
 include $(srctree)/tools/build/Makefile.include
 
 $(OBJTOOL_IN): fixdep FORCE
-	@$(CONFIG_SHELL) ./sync-check.sh
-	@$(MAKE) $(build)=objtool
+	$(Q)$(CONFIG_SHELL) ./sync-check.sh
+	$(Q)$(MAKE) $(build)=objtool
 
 $(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
 	$(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
 
 
 $(LIBSUBCMD_OUTPUT):
-	@$(MKDIR) -p $@
+	$(Q)$(MKDIR) -p $@
 
 $(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
-	@$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
+	$(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
 		DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
 		$@ install_headers