mmc: cb710 core: Add missing spin_lock_init for irq_lock of struct cb710_chip

Signed-off-by: Axel Lin <[e-mail]>
Acked-by: Michał Mirosław <[e-mail]>
Cc: stable <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/cb710/core.c

···
 	if (err)
 		return err;
 
+	spin_lock_init(&chip->irq_lock);
 	chip->pdev = pdev;
 	chip->iobase = pcim_iomap_table(pdev)[0];