update seabios submodule to 1.16.0

update seabios submodule to 1.16.0

git shortlog 6a62e0cb0dfe..rel-1.16.0
-------------------------------------

Florian Larysch (1):
      nvme: fix LBA format data structure

Jan Beulich via SeaBIOS (1):
      nvme: avoid use-after-free in nvme_controller_enable()

Kevin O'Connor (9):
      smm: Suppress gcc array-bounds warnings
      nvme: Rework nvme_io_readwrite() to return -1 on error
      nvme: Add nvme_bounce_xfer() helper function
      nvme: Convert nvme_build_prpl() to nvme_prpl_xfer()
      nvme: Pass prp1 and prp2 directly to nvme_io_xfer()
      nvme: Build the page list in the existing dma buffer
      nvme: Only allocate one dma bounce buffer for all nvme drives
      sercon: Fix missing GET_LOW() to access rx_bytes
      docs: Note v1.16.0 release

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