update seabios to latest master

Upstream seabios commit 5a023065388287e261ae9212452ff541f9fa9cd3

Major changes since 1.7.0:
 - Usual share of bugfixes and cleanups ;)
 - Support for 64bit PCI bars and mapping those above 4G.
 - Stack switching for real mode irq handlers to reduce
   seabios stack footprint.
 - Support for booting from lsi scsi hba.
 - Support for booting from usb attached scsi.
 - Support for non-linear apic ids.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/pc-bios/bios.bin b/pc-bios/bios.bin
index 5734ae5..eac67cb 100644
--- a/pc-bios/bios.bin
+++ b/pc-bios/bios.bin
Binary files differ
diff --git a/roms/seabios b/roms/seabios
index a026308..5a02306 160000
--- a/roms/seabios
+++ b/roms/seabios
@@ -1 +1 @@
-Subproject commit a0263083cb4cda172832fbc916dc1417ee930574
+Subproject commit 5a023065388287e261ae9212452ff541f9fa9cd3