perf trace: Mark bpf's attr as from_user

This one has no specific pretty printer right now, so will be handled by
the generic BTF based one later in this patch series.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-trace.c

@@ -1078,7 +1078,8 @@ static const struct syscall_fmt syscall_fmts[] = {
 		   [1] = SCA_SOCKADDR_FROM_USER(umyaddr),
 		   [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
 	{ .name	    = "bpf",
-	  .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
+	  .arg = { [0] = STRARRAY(cmd, bpf_cmd),
+		   [1] = { .from_user = true /* attr */, }, } },
 	{ .name	    = "brk",	    .hexret = true,
 	  .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
 	{ .name     = "clock_gettime",