The value of tmnxMobProfQciPolQciDscpPreserve specifies if the value of
the Differentiated Services Code Point (DSCP) is preserved or not.
If the value of this object is set to 'enabled', the DSCP bits are
preserved. If the value of this object is set to 'disabled', the DSCP
value is specified to tmnxMobProfQciPolQciDscp and
tmnxMobProfQciPolQciDscpOut.