meta-q71: sensors: phosphor-hwmon enable errno val

When the sensor fails, use the -errno value as the sensor
value instead of removing the sensor.

Change-Id: I8caaa9f30d68cc4dac3004522fe76995ecf35edc
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/meta-q71l/recipes-phosphor/sensors/phosphor-hwmon%.bbappend b/meta-q71l/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
index 7e5e515..c2805af 100644
--- a/meta-q71l/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
+++ b/meta-q71l/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
@@ -12,4 +12,4 @@
 ENVS = "obmc/hwmon/{0}"
 SYSTEMD_ENVIRONMENT_FILE_${PN}_append_quanta-q71l := " ${@compose_list(d, 'ENVS', 'ITEMS')}"
 
-EXTRA_OECONF_append_quanta-q71l = " --enable-remove-from-dbus-on-fail"
+EXTRA_OECONF_append_quanta-q71l = " --enable-negative-errno-on-fail"