Switch pc bios from pc-bios to seabios

SeaBIOS is a port of pc-bios to GCC.  Besides using a more modern tool chain,
SeaBIOS introduces a number of new features including PMM support, better
BEV and BCV support, and better PnP support.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

.gitmodules

diff --git a/.gitmodules b/.gitmodules
index 71494ea..dd4745e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,6 +4,3 @@
 [submodule "roms/seabios"]
 	path = roms/seabios
 	url = ../seabios.git
-[submodule "roms/pcbios"]
-	path = roms/pcbios
-	url = ../pcbios.git

pc-bios/bios.bin

diff --git a/pc-bios/bios.bin b/pc-bios/bios.bin
index 88ef09d..1078809 100644
--- a/pc-bios/bios.bin
+++ b/pc-bios/bios.bin
Binary files differ

pc-bios/pcbios.bin

diff --git a/pc-bios/pcbios.bin b/pc-bios/pcbios.bin
new file mode 100644
index 0000000..88ef09d
--- /dev/null
+++ b/pc-bios/pcbios.bin
Binary files differ

roms/pcbios

diff --git a/roms/pcbios b/roms/pcbios
deleted file mode 160000
index da5ff65..0000000
--- a/roms/pcbios
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit da5ff65dc9473e3f069736d38b9a189ea14a67eb