docs/mb/supermicro/x11ssm-f: Update board documentation

- Drop vanished issue on PCIe warning
- Drop TODO section, since the TODOs are done
- Document the jumper J6, that was not documented by the vendor. Its
  function has been determined by dissecting a dead board.
- The flash is not socketed anymore. Drop that note and compress the
  whole paragraph. Also add a note about flashing via the BMC web
  interface.

Change-Id: I2b5a08a6b6d80717621d6a30f31829fe4b84891a
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48125
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>

0 files changed, 0 insertions, 0 deletions