Bluetooth: Use __le64 type for LE random numbers

The random numbers in Bluetooth Low Energy are 64-bit numbers and should
also be little endian since the HCI specification is little endian.

Change the whole Low Energy pairing to use __le64 instead of a byte
array.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 62d5606..0326648 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -187,7 +187,7 @@
 	__u8	master;
 	__u8	enc_size;
 	__le16	ediv;
-	__u8	rand[8];
+	__le64	rand;
 	__u8	val[16];
 } __packed;