pc-bios: update to latest Seabios

 - 0360e8e Seabios e820 reservation portion v3
 - 7149fc8 Initial support for booting from USB drives.
 - 3c160dd Introduce helper functions for finding USB end-points.
 - 9571439 USB UHCI cleanups.
 - a4bd919 Minor - arrange struct drive_s to clarify field roles.
 - dac46b1 Fix off by one error in strtcpy.
 - d2d1de0 Don't require a valid physical cylinders/heads/spt for logical mapping.
 - 76977b2 Move common "command data block" functions to new file blockcmd.c.
 - d7e998f Dynamically allocate each drive_g with malloc_fseg().
 - 525be69 Add *.pyc to .gitignore.
 - 7d70025 Add common "block command" definitions and update cdrom code.
 - 68caaa7 Optimize ntohl() code.
 - 42157c8 Minor - sort ATA CMD definitions.
 - 54671c1 Initial support for USB hubs.
 - 7852331 Minor - increase debug level of some USB debug statements.
 - ba94a68 Don't leave USB UHCI ports disabled for extended time during reset.
 - 49a0aa6 Don't parallelize USB OHCI root port reset.
 - cfdc13f Introduce standard warnings for allocation failures and timeouts.
 - 8bbc79c Add symbolic definitions for USB delays.
 - 991eaff Support USB interrupt schedules on OHCI and UHCI.
 - 59c7574 Add some ASSERT32FLAT() to help compiler eliminate dead code.
 - e1920be seabios: acpi: fix memory leak in build_srat().
 - 84a4d4b Support USB keyboard auto-repeat.
 - bf7f1f3 mptable: Pull cpuid_signature/features setting out of loop.
 - 6f702dd Rework disabling of ps2 port irqs.
 - 2d3f0f5 Go back to using 0xf0000000 for PCI memory start.
 - 41c0957 Read APIC version from APIC instead of using a hard-coded value.
 - 7a98fd0 Work around bochs floppy issue with wait_irq().
 - 4d07902 Add CONFIG_ATA_DMA option; default to off for now.
 - 3012af1 Fix PkgLength calculation for the SSDT.
 - 92a5742 Add explicit Program Headers to linker scripts.
 - 6fc91b2 Prep version for next release.

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