[ARM] ecard: add ecardm_iomap() / ecardm_iounmap()

Add devres ecardm_iomap() and ecardm_iounmap() for Acorn expansion
cards.  Convert all expansion card drivers to use them.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/scsi/arm/powertec.c b/drivers/scsi/arm/powertec.c
index 3cbd525..d9a546d 100644
--- a/drivers/scsi/arm/powertec.c
+++ b/drivers/scsi/arm/powertec.c
@@ -313,7 +313,6 @@
 {
 	struct Scsi_Host *host;
 	struct powertec_info *info;
-	unsigned long resbase, reslen;
 	void __iomem *base;
 	int ret;
 
@@ -321,9 +320,7 @@
 	if (ret)
 		goto out;
 
-	resbase = ecard_resource_start(ec, ECARD_RES_IOCFAST);
-	reslen = ecard_resource_len(ec, ECARD_RES_IOCFAST);
-	base = ioremap(resbase, reslen);
+	base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
 	if (!base) {
 		ret = -ENOMEM;
 		goto out_region;
@@ -333,7 +330,7 @@
 			       sizeof (struct powertec_info));
 	if (!host) {
 		ret = -ENOMEM;
-		goto out_unmap;
+		goto out_region;
 	}
 
 	ecard_set_drvdata(ec, host);
@@ -404,9 +401,6 @@
 	device_remove_file(&ec->dev, &dev_attr_bus_term);
 	scsi_host_put(host);
 
- out_unmap:
-	iounmap(base);
-
  out_region:
 	ecard_release_resources(ec);
 
@@ -428,8 +422,6 @@
 		free_dma(info->info.scsi.dma);
 	free_irq(ec->irq, info);
 
-	iounmap(info->base);
-
 	fas216_release(host);
 	scsi_host_put(host);
 	ecard_release_resources(ec);