SeaBIOS: Disable serial console if serial is memory mapped

SeaBIOS only supports standard IO based serial ports.  If the serial
port being used by coreboot isn't a standard IO serial port, disable
the serial console in the SeaBIOS build.

Change-Id: I386b46625fca0bd0a5416ed9831f8370c294ed74
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/13617
Tested-by: build bot (Jenkins)
Reviewed-by: Leroy P Leahy <leroy.p.leahy@intel.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2 files changed