MIDEAST STOCKS-Major Gulf markets edge up, weak earnings hit Egypt

* Much Saudi activity focuses on smaller stocks * Dubai's Amlak climbs on Q1 earnings * Gulf Navigation falls despite Q1 profit rise * Abu Dhabi's TAQA slides on quarterly loss * Egypt's Palm Hills, GB Auto, EFG-Hermes fall on earnings By Andrew Torchia DUBAI, May 11 (Reuters) - Most major Gulf stock markets edged up on Wednesday, buoyed by an overnight rise in oil prices and U.S. bourses, while Egypt's market was hit by weak corporate earnings. Saudi Arabia's index closed 0.1 percent higher aft