[Bluetooth] Remove global conf_mtu variable from L2CAP

After the change to the L2CAP configuration parameter handling the
global conf_mtu variable is no longer needed and so remove it.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index 70e70f5d3..f7bcd1f 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -221,7 +221,6 @@
 	__u8		conf_len;
 	__u8		conf_state;
 	__u8		conf_retry;
-	__u16		conf_mtu;
 
 	__u8		ident;
 
@@ -232,10 +231,11 @@
 	struct sock		*prev_c;
 };
 
-#define L2CAP_CONF_REQ_SENT    0x01
-#define L2CAP_CONF_INPUT_DONE  0x02
-#define L2CAP_CONF_OUTPUT_DONE 0x04
-#define L2CAP_CONF_MAX_RETRIES 2
+#define L2CAP_CONF_REQ_SENT	0x01
+#define L2CAP_CONF_INPUT_DONE	0x02
+#define L2CAP_CONF_OUTPUT_DONE	0x04
+
+#define L2CAP_CONF_MAX_RETRIES	2
 
 void l2cap_load(void);