missing CFCR flag in sioreg.h

[Robert Garrett]

Patch attached, this was left out in the update from freebsd

--- sioreg.h    Wed Jan 21 13:07:05 2004
+++ sioreg.new  Wed Jan 21 13:06:35 2004
@@ -32,7 +32,7 @@
  *
  *     from: @(#)comreg.h      7.2 (Berkeley) 5/9/91
  * $FreeBSD: src/sys/isa/sioreg.h,v 1.15.2.3 2003/04/04 08:42:17 sobomax
Exp $
- * $DragonFly$
+ * $DragonFly: src/sys/dev/serial/sio/sioreg.h,v 1.3 2003/11/10 06:12:08
dillon Exp $
  */

 /* Receiver clock frequency for "standard" pc serial ports. */
@@ -65,6 +65,7 @@
 #define        FIFO_RX_HIGH    0xc0

 /* character format control register (aka line control register) */
+#define CFCR_DLAB      0x80
 #define        CFCR_SBREAK     0x40
 #define        CFCR_PZERO      0x30
 #define        CFCR_PONE       0x20