Adding missing sparc device man pages.

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diff --git a/share/man/man4/man4.sparc/cgfour.4 b/share/man/man4/man4.sparc/cgfour.4
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+.\"	$OpenBSD: cgfour.4,v 1.1 1998/03/07 21:17:02 johns Exp $
+.\"	$NetBSD: cgfour.4,v 1.2 1997/10/08 22:00:05 jtc Exp $
+.\"
+.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Paul Kranenburg.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"        This product includes software developed by the NetBSD
+.\"        Foundation, Inc. and its contributors.
+.\" 4. Neither the name of The NetBSD Foundation nor the names of its
+.\"    contributors may be used to endorse or promote products derived
+.\"    from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd June 23, 1996
+.Dt CGFOUR 4 sparc
+.Os
+.Sh NAME
+.Nm cgfour
+.Nd 8-bit color frame buffer
+.Sh SYNOPSIS
+.Cd "cgfour0 at obio0 addr 0xfb300000 level 4" Pq sun4/300
+.Cd "cgfour0 at obio0 addr 0x0b300000 level 4" Pq sun4/100
+.Sh DESCRIPTION
+The 
+.Nm
+is a memory based color frame buffer with overlay plane. Its pixel memory
+and control planes can be mapped into a user process address space by using
+the
+.Xr mmap 2
+system call. The
+.Nm
+driver supports the minimal ioctl's needed to run X11.
+.Sh SEE ALSO
+.Xr bwtwo 4 ,
+.Xr cgtwo 4 ,
+.Xr cgthree 4 ,
+.Xr cgsix 4 ,
+.Xr cgeight 4 ,
+.Xr tcx 4