seabios: update submodule to release 1.11.2

git shortlog rel-1.11.1..rel-1.11.2
-----------------------------------

Gerd Hoffmann (11):
      optionrom: enable non-vga display devices
      cbvga: factor out cbvga_setup_modes()
      qemu: add bochs-display support
      cbvga_setup_modes: use real mode number instead of 0x140
      cbvga_list_modes: don't list current mode twice
      cbvga_set_mode: disable clearmem in windows x86 emulator.
      bochs_display_setup: return error on failure
      pmm: use tmp zone on oom
      vgasrc: add allocate_pmm()
      qemu: add qemu ramfb support
      cbvga_set_mode: refine clear display logic

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>