dm: block: Rename device number member dev to devnum

This is a device number, and we want to use 'dev' to mean a driver model
device. Rename the member.

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/disk/part.c b/disk/part.c
index 9a78cce..2a46050 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -108,7 +108,7 @@
 				return dev_desc;
 			if (!select_hwpart)
 				return NULL;
-			ret = select_hwpart(dev_desc->dev, hwpart);
+			ret = select_hwpart(dev_desc->devnum, hwpart);
 			if (ret < 0)
 				return NULL;
 			return dev_desc;
@@ -325,7 +325,7 @@
 		break;
 	}
 	printf (" device %d  --   Partition Type: %s\n\n",
-			dev_desc->dev, type);
+			dev_desc->devnum, type);
 #endif /* any CONFIG_..._PARTITION */
 }
 
@@ -457,10 +457,6 @@
 	int part;
 	disk_partition_t tmpinfo;
 
-#if defined CONFIG_SANDBOX && defined CONFIG_CMD_UBIFS
-#error Only one of CONFIG_SANDBOX and CONFIG_CMD_UBIFS may be selected
-#endif
-
 #ifdef CONFIG_SANDBOX
 	/*
 	 * Special-case a pseudo block device "hostfs", to allow access to the