NFC: llcp: Implement socket options

Some LLCP services (e.g. the validation ones) require some control over
the LLCP link parameters like the receive window (RW) or the MIU extension
(MIUX). This can only be done through socket options.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 32cec81..5f117ad 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -104,6 +104,9 @@
 	u8 dsap;
 	char *service_name;
 	size_t service_name_len;
+	u8 rw;
+	u16 miux;
+
 
 	/* Remote link parameters */
 	u8 remote_rw;