Restore --no-print-directory option for silent builds

Commit 69fed534a533 ("change how Config is used in Makefile's") removed Config from Makefile. Config had the checks to set VERBOSE based on user request and VERBOSE is used to add the --no-print-directory argument. Since Config is gone, add the relevant setup for VERBOSE to Makefile to restore quieter builds by default.

---
 Makefile | 7 +++++++
 1 file changed, 7 insertions(+)

index 6a51e0db9107..32587db3be70 100644
@@ -1,6 +1,13 @@
 # SPDX-License-Identifier: GPL-2.0
 # Top level Makefile for iproute2
 
+ifeq ("$(origin V)", "command line")
+VERBOSE = $(V)
+endif
+ifndef VERBOSE
+VERBOSE = 0
+endif
+
 ifeq ($(VERBOSE),0)
 MAKEFLAGS += --no-print-directory
 endif

2.11.0