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/common/env_fat.c b/common/env_fat.c
index e88279e..2f22710 100644
--- a/common/env_fat.c
+++ b/common/env_fat.c
@@ -48,7 +48,7 @@
 	if (err)
 		return err;
 
-	part = get_device_and_partition(FAT_ENV_INTERFACE,
+	part = blk_get_device_part_str(FAT_ENV_INTERFACE,
 					FAT_ENV_DEVICE_AND_PART,
 					&dev_desc, &info, 1);
 	if (part < 0)
@@ -82,7 +82,7 @@
 	int dev, part;
 	int err;
 
-	part = get_device_and_partition(FAT_ENV_INTERFACE,
+	part = blk_get_device_part_str(FAT_ENV_INTERFACE,
 					FAT_ENV_DEVICE_AND_PART,
 					&dev_desc, &info, 1);
 	if (part < 0)