SMBIOS slot information in overrridetree is not overriden if device already exist in devicetree. Add support to handle this information from override. BUG= N/A TEST= Verify generated static.c on Intel Coffee Lake CRB Change-Id: I532436aee1d71b79171463124f7b205c145d5b05 Signed-off-by: Frans Hendriks <fhendriks@eltan.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/49738 Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>