NEW YORK — Shirley Eikhard, the singer-songwriter who supplied songs for Cher, Emmylou Harris, Anne Murray, Chet Atkins and found lasting fame penning Bonnie Raitt‘s Grammy-winning 1991 hit “Something to Talk About,” has died. On Grammy night, Raitt made sure to thank Eikhard and she turned to Twitter after Eikhard’s death to say she was “deeply saddened,” writing “I will …