block: pass block dev not num to read/write/erase()

This will allow the implementation to make use of data in the block_dev
structure beyond the base device number. This will be useful so that eMMC
block devices can encompass the HW partition ID rather than treating this
out-of-band. Equally, the existence of the priv field is crying out for
this patch to exist.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/disk/part_dos.c b/disk/part_dos.c
index 6280660..1e5cb33 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -91,7 +91,7 @@
 {
 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 
-	if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1)
+	if (dev_desc->block_read(dev_desc, 0, 1, (ulong *)buffer) != 1)
 		return -1;
 
 	if (test_block_type(buffer) != DOS_MBR)
@@ -111,7 +111,8 @@
 	dos_partition_t *pt;
 	int i;
 
-	if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
+	if (dev_desc->block_read(dev_desc, ext_part_sector, 1,
+				 (ulong *)buffer) != 1) {
 		printf ("** Can't read partition table on %d:" LBAFU " **\n",
 			dev_desc->dev, ext_part_sector);
 		return;
@@ -177,7 +178,8 @@
 	int i;
 	int dos_type;
 
-	if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
+	if (dev_desc->block_read(dev_desc, ext_part_sector, 1,
+				 (ulong *)buffer) != 1) {
 		printf ("** Can't read partition table on %d:" LBAFU " **\n",
 			dev_desc->dev, ext_part_sector);
 		return -1;