Add Portworx CSI support (#1167)

diff --git a/roles/csi/meta/main.yml b/roles/csi/meta/main.yml
index 58e6c8b..4615572 100644
--- a/roles/csi/meta/main.yml
+++ b/roles/csi/meta/main.yml
@@ -36,5 +36,7 @@
     when: csi_driver == "rbd"
   - role: powerstore_csi
     when: csi_driver == "powerstore"
+  - role: portworx
+    when: csi_driver == "portworx"
   - role: storpool_csi
     when: csi_driver == "storpool"