By Greg Bishop The Hall of Famer never got over how the organization treated him during his prime. Time, a return to L.A. and a Super Bowl are changing that. The rally doubles as an autograph session, from the second that Eric Dickerson strolls onto the field at the Oaks Christian School on Monday evening until he leaves, an hour later, having moved only a little more than the length of a football field. Thousands have gathered, packing into the grandstands and lining the spongy track. They’re clad in Rams jerseys and Rams hoodies and Rams socks, bracelets and wrestling masks. They’re wearing …