Bluetooth: Add support for management powered event

This patch adds support for the powered event that's used to indicate to
userspace when the powered state of a local adapter changes.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index d479e24..f746e19 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -316,3 +316,13 @@
 
 	return mgmt_event(MGMT_EV_INDEX_REMOVED, &ev, sizeof(ev));
 }
+
+int mgmt_powered(u16 index, u8 powered)
+{
+	struct mgmt_ev_powered ev;
+
+	put_unaligned_le16(index, &ev.index);
+	ev.powered = powered;
+
+	return mgmt_event(MGMT_EV_POWERED, &ev, sizeof(ev));
+}