fs/vfs/fs_poll: Add noinstrument_function to poll_notify function

Add the noinstrument_function attribute to the poll_notify function
to avoid it being looped if -finstrument-functions is set to the
fs/vfs files.

Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>

fs/vfs/fs_poll.c

@@ -272,6 +272,7 @@ void poll_default_cb(FAR struct pollfd *fds)
  *
  ****************************************************************************/
 
+noinstrument_function
 void poll_notify(FAR struct pollfd **afds, int nfds, pollevent_t eventset)
 {
   int i;