meta-ibm: Mihawk use negative-errno-on-fail config

Enable this config for mihawk so the fan sensors are working, otherwise
hwmon will fail and exit when fans are not working.

Tested: Verify that the fan_tach sensors return -ETIMEOUT when host is
        powered off and do not exit with failure.

Signed-off-by: Ben Pai <Ben_Pai@wistron.com>
Change-Id: I5b808183afcdb193ea39d7cd91e978a7902a4d34
1 file changed