hw/ppc/prep: Remove the deprecated "prep" machine and the OpenHackware BIOS

It's been deprecated since QEMU v3.1. The 40p machine should be
used nowadays instead.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200114114617.28854-1-thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 2328e7e..b79f1c3 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -1729,7 +1729,7 @@
 @section PowerPC System emulator
 @cindex system emulation (PowerPC)
 
-Use the executable @file{qemu-system-ppc} to simulate a complete PREP
+Use the executable @file{qemu-system-ppc} to simulate a complete 40P (PREP)
 or PowerMac PowerPC system.
 
 QEMU emulates the following PowerMac peripherals:
@@ -1749,7 +1749,7 @@
 VIA-CUDA with ADB keyboard and mouse.
 @end itemize
 
-QEMU emulates the following PREP peripherals:
+QEMU emulates the following 40P (PREP) peripherals:
 
 @itemize @minus
 @item
@@ -1761,7 +1761,7 @@
 @item
 Floppy disk
 @item
-NE2000 network adapters
+PCnet network adapters
 @item
 Serial port
 @item
@@ -1770,12 +1770,9 @@
 PC compatible keyboard and mouse.
 @end itemize
 
-QEMU uses the Open Hack'Ware Open Firmware Compatible BIOS available at
-@url{http://perso.magic.fr/l_indien/OpenHackWare/index.htm}.
-
 Since version 0.9.1, QEMU uses OpenBIOS @url{https://www.openbios.org/}
-for the g3beige and mac99 PowerMac machines. OpenBIOS is a free (GPL
-v2) portable firmware implementation. The goal is to implement a 100%
+for the g3beige and mac99 PowerMac and the 40p machines. OpenBIOS is a free
+(GPL v2) portable firmware implementation. The goal is to implement a 100%
 IEEE 1275-1994 (referred to as Open Firmware) compliant firmware.
 
 @c man begin OPTIONS
@@ -1798,8 +1795,6 @@
  -prom-env 'boot-args=conf=hd:2,\yaboot.conf'
 @end example
 
-These variables are not used by Open Hack'Ware.
-
 @end table
 
 @c man end