tools/resolve_btfids: Do not print any commands when building silently

When building with 'make -s', there is some output from resolve_btfids:

$ make -sj"$(nproc)" oldconfig prepare
  MKDIR     .../tools/bpf/resolve_btfids/libbpf/
  MKDIR     .../tools/bpf/resolve_btfids//libsubcmd
  LINK     resolve_btfids

Silent mode means that no information should be emitted about what is currently being done. Use the $(silent) variable from Makefile.include to avoid defining the msg macro so that there is no information printed.

---

This should apply to either bpf or bpf-next so no subject prefix. I would prefer it goes in sooner rather than later but I'll leave that up to you all.

 tools/bpf/resolve_btfids/Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

index 9ddeca947635..320a88ac28c9 100644
@@ -9,7 +9,11 @@ ifeq ($(V),1)
   msg =
 else
   Q = @
-  msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
+  ifeq ($(silent),1)
+    msg =
+  else
+    msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
+  endif
   MAKEFLAGS=--no-print-directory
 endif
 

base-commit: 26291c54e111ff6ba87a164d85d4a4e134b7315c

2.35.1