[Blackfin] arch: respect `make -s` when creating the asm/mach symlink

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/Makefile

@@ -98,8 +98,10 @@ drivers-$(CONFIG_OPROFILE) += arch/$(ARCH)/oprofile/
 #	them changed.  We use .mach to indicate when they were updated
 #	last, otherwise make uses the target directory mtime.
 
+ quiet_show_mach_symlink = echo '  SYMLINK include/asm-$(ARCH)/mach-$(MACHINE) -> include/asm-$(ARCH)/mach'
+silent_show_mach_symlink = :
 include/asm-blackfin/.mach: $(wildcard include/config/arch/*.h) include/config/auto.conf
-	@echo '  SYMLINK include/asm-$(ARCH)/mach-$(MACHINE) -> include/asm-$(ARCH)/mach'
+	@$($(quiet)show_mach_symlink)
 ifneq ($(KBUILD_SRC),)
 	$(Q)mkdir -p include/asm-$(ARCH)
 	$(Q)ln -fsn $(srctree)/include/asm-$(ARCH)/mach-$(MACHINE) include/asm-$(ARCH)/mach