Use firmware configuration instead of NVRAM (initial patch by Aurelien Jarno)

Use firmware configuration device for boot device, kernel, initrd and
kernel command line parameters on PPC, Sparc32 and Sparc64.

Update OpenBIOS images to r479 which supports the change.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6777 c046a42c-6fe2-441c-8c8c-71466251a162

pc-bios/README

@@ -42,7 +42,7 @@
   firmware implementation. The goal is to implement a 100% IEEE
   1275-1994 (referred to as Open Firmware) compliant firmware.
   The included images for Sparc32, Sparc64 and PowerPC (for 32 and 64 bit
-  PPC CPUs) are built from OpenBIOS 1.0 release (SVN revision 463).
+  PPC CPUs) are built from OpenBIOS SVN revision 479.
 
 - The PXE roms come from Rom-o-Matic etherboot 5.4.2.
   pcnet32:pcnet32 -- [0x1022,0x2000]