GitLab

- Set supported buses based on ISA bridge reg 0x8a
- Use MCP55 chipset enable only if LPC is detected
- Allow LPC on MCP61
- Eliminate duplicated code where possible

Corresponding to flashrom svn r906.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>