json config: Trace when conf files can't be found

Add a trace to the journal when the IBMCompatibleSystem interface is
available but the JSON configuration file being looked for still can't
be found.

This would indicate someone hasn't yet put the fan config files in the
driver for a particular system type.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I3caa223d8b5d56bfb903c7de06cdd3bc95a4b81a
1 file changed