Bluetooth: Add read_index_list management command

This patch implements the read_index_list command through which
userspace can get a list of current adapter indices.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index d353d64..c2b4c83 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -33,6 +33,12 @@
 	__le16 revision;
 } __packed;
 
+#define MGMT_OP_READ_INDEX_LIST		0x0003
+struct mgmt_rp_read_index_list {
+	__le16 num_controllers;
+	__le16 index[0];
+} __packed;
+
 #define MGMT_EV_CMD_COMPLETE		0x0001
 struct mgmt_ev_cmd_complete {
 	__le16 opcode;