Bluetooth: Fix permission of enable_le param

With 0444 it is impossible to change the param, changing it to 0644.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index d7d96b6..0e57634 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3104,5 +3104,5 @@
 	kfree_skb(skb);
 }
 
-module_param(enable_le, bool, 0444);
+module_param(enable_le, bool, 0644);
 MODULE_PARM_DESC(enable_le, "Enable LE support");