[S390] qdio: make sure qdr is aligned to page size

kzalloc does not guarantee the required alignment of qdr to page size,
use get_zeroed_page instead.
Signed-off-by: NJan Glauber <jang@linux.vnet.ibm.com>

drivers/s390/cio/qdio_main.c

@@ -1355,7 +1355,7 @@ int qdio_allocate(struct qdio_initialize *init_data)
 		goto out_rel;
 
 	/* qdr is used in ccw1.cda which is u32 */
-	irq_ptr->qdr = kzalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
+	irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
 	if (!irq_ptr->qdr)
 		goto out_rel;
 	WARN_ON((unsigned long)irq_ptr->qdr & 0xfff);

drivers/s390/cio/qdio_setup.c

@@ -325,7 +325,7 @@ void qdio_release_memory(struct qdio_irq *irq_ptr)
 			kmem_cache_free(qdio_q_cache, q);
 		}
 	}
-	kfree(irq_ptr->qdr);
+	free_page((unsigned long) irq_ptr->qdr);
 	free_page(irq_ptr->chsc_page);
 	free_page((unsigned long) irq_ptr);
 }