PHOTO: College Football Hall of Fame coach Darrell Royal turned to Willie Ray Smith Sr. when he realized it was time to integrate his football program. By TOM SHANAHAN Darrell Royal, as his surname suggests, coached Texas football dripping with royalty. The College Football Hall of Famer reigned 20 years, winning unbeaten national championships in 1963 and 1969 and posting six double-digit victory seasons. Willie Ray Smith, an uncommon coach with a common surname, toiled at three underfunded…