Adding OEM specific SMBIOS patch files.
 Changes to be committed:
new file:   oem/dell-960-optiplex-smbios.patch
new file:   oem/dell-e6500-latitude-smbios.patch
new file:   oem/hp-6930p-elitebook-smbios.patch
new file:   oem/lenovo-x200-thinkpad-smbios.patch

Compilation
- Remove the checks
- Remove the compilation of fs-back
- Change the cpu argument when we cross compile ioemu in x86_32

[xenpmd] Add sci for power management

[xenpmd] Add xenpmd
Those files were missing since the switching to git.

[tools] Add ps2back headers file

[firmware]
  - Add a missing file: tools/firmware/hvmloader/markers.h

patch suspend-header

patch bcredit

patch compiled_vendor_smbios

patch power_management_vapic_follow_up

patch power_management_vacpi_changes

patch hvm_battery_management

patch xenpmd

patch std_vga_vbe3

patch pci_serial-xen

patch change_ioemu_tree

patch remove_check_x11_devel

patch hvm_build_copy_bios

patch higher_priority_vector_for_acpi

patch tools_get_vgapt_option

patch get_bios_from_0xC0000

patch change_pci_base

patch shadow_check_invalid_mfn

patch remove_failed_assert

patch change_vga_whole_cacheattr

Import xen-unstable, changeset 18641 6bf61b830153