Bluetooth: btrsi: add new rsi bluetooth driver

Redpine bluetooth driver is a thin driver which depends on
'rsi_91x' driver for transmitting and receiving packets
to/from device. It creates hci interface when attach() is
called from 'rsi_91x' module.

Signed-off-by: Prameela Rani Garnepudi <prameela.j04cs@gmail.com>
Signed-off-by: Siva Rebbagondla <siva.rebbagondla@redpinesignals.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Amitkumar Karwar <amit.karwar@redpinesignals.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

include/net/rsi_91x.h

@@ -49,6 +49,8 @@ struct rsi_proto_ops {
 struct rsi_mod_ops {
 	int (*attach)(void *priv, struct rsi_proto_ops *ops);
 	void (*detach)(void *priv);
-	int (*recv_pkt)(void *priv, u8 *msg);
+	int (*recv_pkt)(void *priv, const u8 *msg);
 };
+
+extern const struct rsi_mod_ops rsi_bt_ops;
 #endif