autotest: only delete partitions on NVMe namespaces

Don't try to delete partitions on NVMe block devices that are already
partitions.  For example, clean up nvme0n1 but not nvme0n1p1.

Change-Id: I1f642abd7f6ff6b9b6c08d65afee04b9bc9a3430
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>

autotest.sh

@@ -49,7 +49,7 @@ if [ $(uname -s) = Linux ]; then
 	sleep 10
 
 	# Delete all partitions on NVMe devices
-	devs=`lsblk -l -o NAME | grep nvme`
+	devs=`lsblk -l -o NAME | grep nvme | grep -v p`
 	for dev in $devs; do
 		parted -s /dev/$dev mklabel msdos
 	done