vendorcode/amd/cimx/sbX00: Make SBPort.c filename consistent

Change-Id: I41ba4cffa545a31c1e0845ec44c8a433bda9f99d
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7886
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
6 files changed