By Chris Smith The LA Galaxy travel to the Houston Dynamo on the final day of the regular season with their MLS Cup Playoffs spot already secured, but there are still plenty of reasons to treat it as a must-win. LA are back in the Playoffs after missing out for the last two seasons and need to remember quickly the intensity of a one-off knockout match. What’s more, should they fail to beat the Dynamo, Nashville SC could climb above them into fourth in the Western Conference with a point against LAFC, in turn stealing the Galaxy’s home match in the first round of the Playoffs – a famously effec…