pseries: Update SLOF

This patch updates the SLOF version, introducing a number of fixes:
 * add proper graphics support
 * fix bugs with graphical terminal under grub2
 * fix bugs in handling of 64-bit unit addresses
 * fix VSCSI representation to be closer to PowerVM
 * fix bugs which caused grub2 to crash

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>

pc-bios/README

diff --git a/pc-bios/README b/pc-bios/README
index e56e9e5..e71bcd0 100644
--- a/pc-bios/README
+++ b/pc-bios/README
@@ -17,7 +17,7 @@
 - SLOF (Slimline Open Firmware) is a free IEEE 1275 Open Firmware
   implementation for certain IBM POWER hardware.  The sources are at
   https://github.com/dgibson/SLOF, and the image currently in qemu is
-  built from git tag qemu-slof-20120217.
+  built from git tag qemu-slof-20120719.
 
 - sgabios (the Serial Graphics Adapter option ROM) provides a means for
   legacy x86 software to communicate with an attached serial console as

pc-bios/slof.bin

diff --git a/pc-bios/slof.bin b/pc-bios/slof.bin
index 449a7bb..320b8f0 100644
--- a/pc-bios/slof.bin
+++ b/pc-bios/slof.bin
Binary files differ

roms/SLOF

diff --git a/roms/SLOF b/roms/SLOF
index d153364..7279655 160000
--- a/roms/SLOF
+++ b/roms/SLOF
@@ -1 +1 @@
-Subproject commit d153364253548d6cd91403711f84996e6a7dab31
+Subproject commit 7279655af2eba855bd2df61303d25abd1eeb2300