sensors: Set event messages enabled bit

Should be set to 1.

Tested-by: ipmi get sensor reading raw cmd

Change-Id: I7597cef9a12ec2839983fda3310b4d4071e690f2
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/src/sensorcommands.cpp b/src/sensorcommands.cpp
index 084b69d..4b68d83 100644
--- a/src/sensorcommands.cpp
+++ b/src/sensorcommands.cpp
@@ -243,6 +243,8 @@
         scaleIPMIValueFromDouble(reading, mValue, rExp, bValue, bExp, bSigned);
     msgReply->operation =
         static_cast<uint8_t>(IPMISensorReadingByte2::sensorScanningEnable);
+    msgReply->operation |=
+        static_cast<uint8_t>(IPMISensorReadingByte2::eventMessagesEnable);
     msgReply->indication[0] = 0; // ignore for non-threshold sensors
     msgReply->indication[1] = 0;