mfd: Use devm_* APIs for mc13xxx: remove leftover kfree

commit e7c706b1 migrated the allocation
of struct mc13xxx to devm_* functions, but left a kfree(mc13xxx) in the
mc13xxx_common_init error path. Remove it to prevent memory corruption.
Signed-off-by: Andreas Pretzsch <apr@cn-eng.de>
Reviewed-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/mc13xxx-core.c

@@ -676,7 +676,6 @@ int mc13xxx_common_init(struct mc13xxx *mc13xxx,
 err_mask:
 err_revision:
 		mc13xxx_unlock(mc13xxx);
-		kfree(mc13xxx);
 		return ret;
 	}