Bluetooth: Implement Read Supported Commands commands for mgmt

This patch implements the Read Supported Commands mgmt command which was
recently added to the API specification. It returns a list of supported
commands and events to user space.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/mgmt.h

@@ -63,6 +63,13 @@ struct mgmt_rp_read_version {
 	__le16 revision;
 } __packed;
 
+#define MGMT_OP_READ_COMMANDS		0x0002
+struct mgmt_rp_read_commands {
+	__le16 num_commands;
+	__le16 num_events;
+	__le16 opcodes[0];
+} __packed;
+
 #define MGMT_OP_READ_INDEX_LIST		0x0003
 struct mgmt_rp_read_index_list {
 	__le16 num_controllers;