swift: Move fan presence config

Fan presence config files reside under the machine name directory within
`phosphor-fan-presence-config`.

Tested:
    Verified config.yaml picked up for witherspoon machine
    Verified config.yaml picked up for swift machine

Change-Id: I32add6eea4c15ac509f3d986d56de1b809f2cdc9
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
1 file changed