Drain the excess liquid from the black eyed peas (some liquid will remain) and add to a food processor with the diced chiles, salt, pepper, garlic powder and cumin. Pulse to combine, then blend on low until creamy. Transfer to the baking dish and set the cream cheese on top. Cover with lid or foil and bake for 15 minutes or until the cream cheese has completely softened. Remove from the oven and stir in the cream cheese until fully incorporated.