Update OpenBIOS images

Update OpenBIOS images to OpenBIOS 1.1 release (SVN r1136) built from
submodule.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

pc-bios/README

@@ -11,8 +11,8 @@
   firmware implementation. The goal is to implement a 100% IEEE
   1275-1994 (referred to as Open Firmware) compliant firmware.
   The included images for PowerPC (for 32 and 64 bit PPC CPUs),
-  Sparc32 and Sparc64 are built from OpenBIOS SVN revision
-  1063.
+  Sparc32 and Sparc64 are built from OpenBIOS 1.1 release (SVN
+  revision 1136).
 
 - SLOF (Slimline Open Firmware) is a free IEEE 1275 Open Firmware
   implementation for certain IBM POWER hardware.  The sources are at