net: sctp: Rename SCTP_XMIT_NAGLE_DELAY to SCTP_XMIT_DELAY

MSG_MORE and 'corking' a socket would require that the transmit of
a data chunk be delayed.
Rename the return value to be less specific.

Signed-off-by: David Laight <david.laight@aculab.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/output.c b/net/sctp/output.c
index f3bf0ae..1eedba5 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -178,7 +178,7 @@
 
 	case SCTP_XMIT_RWND_FULL:
 	case SCTP_XMIT_OK:
-	case SCTP_XMIT_NAGLE_DELAY:
+	case SCTP_XMIT_DELAY:
 		break;
 	}
 
@@ -712,7 +712,7 @@
 		return SCTP_XMIT_OK;
 
 	/* Defer until all data acked or packet full */
-	return SCTP_XMIT_NAGLE_DELAY;
+	return SCTP_XMIT_DELAY;
 }
 
 /* This private function does management things when adding DATA chunk */