dm: blk: Rename get_device_and_partition()

Rename this function to blk_get_device_part_str(). This is a better name
because it makes it clear that the function returns a block device and
parses a string.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
diff --git a/cmd/disk.c b/cmd/disk.c
index c53c2a2..0883c79 100644
--- a/cmd/disk.c
+++ b/cmd/disk.c
@@ -38,7 +38,7 @@
 
 	bootstage_mark(BOOTSTAGE_ID_IDE_BOOT_DEVICE);
 
-	part = get_device_and_partition(intf, (argc == 3) ? argv[2] : NULL,
+	part = blk_get_device_part_str(intf, (argc == 3) ? argv[2] : NULL,
 					&dev_desc, &info, 1);
 	if (part < 0) {
 		bootstage_error(BOOTSTAGE_ID_IDE_TYPE);