bootstd: Rename bootdev_setup_sibling_blk()

This name is a little confusing since it suggests that it sets up the
sibling block device. In fact it sets up a bootdev for it. Rename the
function to make this clearer.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 01d9b02..0e15767 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -421,7 +421,7 @@
 	mmc->cfg = cfg;
 	mmc->priv = dev;
 
-	ret = bootdev_setup_sibling_blk(bdev, "mmc_bootdev");
+	ret = bootdev_setup_for_sibling_blk(bdev, "mmc_bootdev");
 	if (ret)
 		return log_msg_ret("bootdev", ret);