block: ide: Fix build error when CONFIG_BLK is on

Add missing #ifndef CONFIG_BLK to wrap dev_desc->block_read.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/block/ide.c

@@ -469,7 +469,9 @@ static void atapi_inquiry(struct blk_desc *dev_desc)
 
 	device = dev_desc->devnum;
 	dev_desc->type = DEV_TYPE_UNKNOWN;	/* not yet valid */
+#ifndef CONFIG_BLK
 	dev_desc->block_read = atapi_read;
+#endif
 
 	memset(ccb, 0, sizeof(ccb));
 	memset(iobuf, 0, sizeof(iobuf));