mailbox: Prototype mbox_client_peek_data()
This is an interface intended for client drivers and exported but it is
not prototyped in the headers so can't be used. Add a prototype.
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/include/linux/mailbox_client.h b/include/linux/mailbox_client.h
index 53eb078..cbfcf84 100644
--- a/include/linux/mailbox_client.h
+++ b/include/linux/mailbox_client.h
@@ -40,6 +40,7 @@
struct mbox_chan *mbox_request_channel(const struct mbox_client *cl);
int mbox_send_message(struct mbox_chan *chan, void *mssg);
void mbox_client_txdone(struct mbox_chan *chan, int r);
+bool mbox_client_peek_data(struct mbox_chan *chan);
void mbox_free_channel(struct mbox_chan *chan);
#endif /* __MAILBOX_CLIENT_H */