Gov. Chris Christie says he’d be in favor of approving partnerships of the kind soon to be announced between the Florida-based Hard Rock gaming company and the Meadowlands Racetrack for a casino in north Jersey — as long as tax revenues from such ventures would help pay to revitalize ailing Atlantic City. Speaking on his monthly radio show, Christie said that while no one had presented the proposal to him, he had heard “rumblings” that the state Legislature planned to place the idea on the November ballot for a statewide referendum on expanding gaming to the northern part of the…