perf augmented_raw_syscalls: Postpone tmp map lookup to after pid_filter

No sense in doing that lookup before figuring out if it will be used,
i.e. if the pid is being filtered that tmp space lookup will be useless.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-o74yggieorucfg4j74tb6rta@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/examples/bpf/augmented_raw_syscalls.c

@@ -250,13 +250,13 @@ int sys_enter(struct syscall_enter_args *args)
 	struct syscall *syscall;
 	int key = 0;
 
+	if (pid_filter__has(&pids_filtered, getpid()))
+		return 0;
+
         augmented_args = bpf_map_lookup_elem(&augmented_args_tmp, &key);
         if (augmented_args == NULL)
                 return 1;
 
-	if (pid_filter__has(&pids_filtered, getpid()))
-		return 0;
-
 	probe_read(&augmented_args->args, sizeof(augmented_args->args), args);
 
 	/*