[SeaBIOS] [PATCH v6 0/3] Boot up with a splash picture configurable

[Wayne Xia]

Patch 1 and 2 remains the same with V5, only patch 3 is new, it need
the patch
"Add "romfile" code to assist with extract integer config settings."
applied.

sorry for that previous patches got a bit mess about the versions,
please have a look about this one.

short description about patch 3:
    when it boot up, try discover the qemu' configuration about whether
to show a brand picture, with out a menu followed.