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/drivers/mmc/mmc_private.h b/drivers/mmc/mmc_private.h
index 447a700..6a70639 100644
--- a/drivers/mmc/mmc_private.h
+++ b/drivers/mmc/mmc_private.h
@@ -22,23 +22,24 @@
 
 #ifndef CONFIG_SPL_BUILD
 
-extern unsigned long mmc_berase(int dev_num, lbaint_t start, lbaint_t blkcnt);
+unsigned long mmc_berase(block_dev_desc_t *block_dev, lbaint_t start,
+			 lbaint_t blkcnt);
 
-extern ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt,
-		const void *src);
+unsigned long mmc_bwrite(block_dev_desc_t *block_dev, lbaint_t start,
+			 lbaint_t blkcnt, const void *src);
 
 #else /* CONFIG_SPL_BUILD */
 
 /* SPL will never write or erase, declare dummies to reduce code size. */
 
-static inline unsigned long mmc_berase(int dev_num, lbaint_t start,
-		lbaint_t blkcnt)
+static inline unsigned long mmc_berase(block_dev_desc_t *block_dev,
+				       lbaint_t start, lbaint_t blkcnt)
 {
 	return 0;
 }
 
-static inline ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt,
-		const void *src)
+static inline ulong mmc_bwrite(block_dev_desc_t *block_dev, lbaint_t start,
+			       lbaint_t blkcnt, const void *src)
 {
 	return 0;
 }