Revert "blk: Invalidate block cache when switching hwpart"

This reverts commit 0ebe112d.

Most block devices have only one hwpart. Multiple hwparts only found used
by eMMC devices in u-boot. The mmc driver do blk_dselect_hwpart() at the
beginning of mmc_bread() which causes block cache being invalidated too
frequently and makes block cache useless.

So it's not a good idea to put blkcache_invalidate() in the common
functions. It should be called inside mmc_select_hwpart().
Signed-off-by: NWeijie Gao <weijie.gao@mediatek.com>
Tested-by: NFelix Brack <fb@ltec.ch>

drivers/block/blk-uclass.c

@@ -208,11 +208,7 @@ int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart)
 	if (ret)
 		return ret;
 
-	ret = blk_select_hwpart(dev, hwpart);
-	if (!ret)
-		blkcache_invalidate(if_type, devnum);
-
-	return ret;
+	return blk_select_hwpart(dev, hwpart);
 }
 
 int blk_list_part(enum if_type if_type)
@@ -352,13 +348,7 @@ int blk_select_hwpart(struct udevice *dev, int hwpart)
 
 int blk_dselect_hwpart(struct blk_desc *desc, int hwpart)
 {
-	int ret;
-
-	ret = blk_select_hwpart(desc->bdev, hwpart);
-	if (!ret)
-		blkcache_invalidate(desc->if_type, desc->devnum);
-
-	return ret;
+	return blk_select_hwpart(desc->bdev, hwpart);
 }
 
 int blk_first_device(int if_type, struct udevice **devp)