ide: constify struct ide_dma_ops

* Export ide_dma_exec_cmd() and __ide_dma_test_irq().

* Constify struct ide_dma_ops.

* Always set hwif->dma_ops to &sff_dma_ops in ide_setup_dma()
  (it is later overriden by ide_init_port() if needed) and drop
  'const struct ide_port_info *d' argument.

While at it:

* Rename __ide_dma_test_irq() to ide_dma_test_irq().

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/arm/icside.c b/drivers/ide/arm/icside.c
index adfeed4..7d642f4 100644
--- a/drivers/ide/arm/icside.c
+++ b/drivers/ide/arm/icside.c
@@ -392,7 +392,7 @@
 	return 0;
 }
 
-static struct ide_dma_ops icside_v6_dma_ops = {
+static const struct ide_dma_ops icside_v6_dma_ops = {
 	.dma_host_set		= icside_dma_host_set,
 	.dma_setup		= icside_dma_setup,
 	.dma_exec_cmd		= icside_dma_exec_cmd,
diff --git a/drivers/ide/arm/palm_bk3710.c b/drivers/ide/arm/palm_bk3710.c
index 5853f11..8fa34e2 100644
--- a/drivers/ide/arm/palm_bk3710.c
+++ b/drivers/ide/arm/palm_bk3710.c
@@ -328,7 +328,7 @@
 	if (ide_allocate_dma_engine(hwif))
 		return -1;
 
-	ide_setup_dma(hwif, base, d);
+	ide_setup_dma(hwif, base);
 
 	return 0;
 }