Fix CBMEM console overflow

In CBMEM console, cursor increments past the buffer size to
indicate the number of characters missing from log output.

Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
coreboot: Make sure to print the SeaBIOS version in cbmem debug output.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>