Update OpenBIOS images to 54d959d9 built from submodule.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
diff --git a/pc-bios/openbios-ppc b/pc-bios/openbios-ppc
index 3596529..af70c36 100644
--- a/pc-bios/openbios-ppc
+++ b/pc-bios/openbios-ppc
Binary files differ
diff --git a/pc-bios/openbios-sparc32 b/pc-bios/openbios-sparc32
index 7b5dc08..9e736e8 100644
--- a/pc-bios/openbios-sparc32
+++ b/pc-bios/openbios-sparc32
Binary files differ
diff --git a/pc-bios/openbios-sparc64 b/pc-bios/openbios-sparc64
index a4a3b8d..82ea0f8 100644
--- a/pc-bios/openbios-sparc64
+++ b/pc-bios/openbios-sparc64
Binary files differ
diff --git a/roms/openbios b/roms/openbios
index b5c93ac..54d959d 160000
--- a/roms/openbios
+++ b/roms/openbios
@@ -1 +1 @@
-Subproject commit b5c93acd14b7b3886c2c81d84cd18e666984a4c8
+Subproject commit 54d959d97fb331708767b2fd4a878efd2bbc41bb