ide: constify ide_dma_ops structures

The ide_dma_ops structures are never modified, so declare these as const,
as is already done for the others.

Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/ide/it821x.c

@@ -508,7 +508,7 @@ static void it821x_quirkproc(ide_drive_t *drive)
 
 }
 
-static struct ide_dma_ops it821x_pass_through_dma_ops = {
+static const struct ide_dma_ops it821x_pass_through_dma_ops = {
 	.dma_host_set		= ide_dma_host_set,
 	.dma_setup		= ide_dma_setup,
 	.dma_start		= it821x_dma_start,

drivers/ide/trm290.c

@@ -314,7 +314,7 @@ static const struct ide_tp_ops trm290_tp_ops = {
 	.output_data		= ide_output_data,
 };
 
-static struct ide_dma_ops trm290_dma_ops = {
+static const struct ide_dma_ops trm290_dma_ops = {
 	.dma_host_set		= trm290_dma_host_set,
 	.dma_setup 		= trm290_dma_setup,
 	.dma_start 		= trm290_dma_start,