[PATCH 9_9] Use "void *" not "unsigned long *" for block dev read_write buffer pointers

Block device read/write is anonymous data; there is no need to use a
typed pointer.  void * is fine.  Also add a hook for block_read functions

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/include/ide.h b/include/ide.h
index e29ed36..6976a6c 100644
--- a/include/ide.h
+++ b/include/ide.h
@@ -49,7 +49,7 @@
  */
 
 void ide_init(void);
-ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
-ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
+ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
+ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
 
 #endif /* _IDE_H */