Remove MCP6/7/8 SPI log requests.

We got enough (and no one is looking at them for the time being anyway).
Also, return an error code in the case no bus type could be detected.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

git-svn-id: svn://flashrom.org/flashrom/trunk@1820 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Add selfcheck_board_enables().

Check for NULL termination of the array, that each board has the two
main PCI ID sets defined, that coreboot vendor and model fields are either
both set or unset, and that at least either an enable function or a max
decode size is available.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

git-svn-id: svn://flashrom.org/flashrom/trunk@1821 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1