[Bluetooth] Use hci_recv_fragment() within HCI USB driver

This patch modifies the HCI USB driver to use the new helper function
for reassembling HCI data packets and events.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/hci_usb.h b/drivers/bluetooth/hci_usb.h
index 963fc55..56cd3a9 100644
--- a/drivers/bluetooth/hci_usb.h
+++ b/drivers/bluetooth/hci_usb.h
@@ -102,9 +102,9 @@
 	struct hci_dev		*hdev;
 
 	unsigned long		state;
-	
+
 	struct usb_device	*udev;
-	
+
 	struct usb_host_endpoint	*bulk_in_ep;
 	struct usb_host_endpoint	*bulk_out_ep;
 	struct usb_host_endpoint	*intr_in_ep;
@@ -116,7 +116,6 @@
 	__u8			ctrl_req;
 
 	struct sk_buff_head	transmit_q[4];
-	struct sk_buff		*reassembly[4];		/* Reassembly buffers */
 
 	rwlock_t		completion_lock;