Secret update for Powerflex driver (#971)

Author: adarsh-dell

content/docs/deployment/csmoperator/drivers/powerflex.md

@@ -70,7 +70,7 @@ For detailed PowerFlex installation procedure, see the _Dell PowerFlex Deploymen
      ```yaml
       # Username for accessing PowerFlex system.
       # If authorization is enabled, username will be ignored.
-     - username: "admin"
+    - username: "admin"
       # Password for accessing PowerFlex system.
       # If authorization is enabled, password will be ignored.
       password: "password"
@@ -121,7 +121,7 @@ For detailed PowerFlex installation procedure, see the _Dell PowerFlex Deploymen
 
     ```bash
     
-    kubectl create secret generic vxflexos-config -n vxflexos --from-file=config=config.yaml -o yaml --dry-run=client | kubectl replace -f -
+    kubectl create secret generic vxflexos-config -n vxflexos --from-file=config=secret.yaml -o yaml --dry-run=client | kubectl replace -f -
     ```
 
 ### Install Driver

content/docs/deployment/helm/drivers/installation/powerflex.md

@@ -91,7 +91,7 @@ Note that the namespace can be any user-defined name that follows the convention
     | skipCertificateValidation  | Determines if the driver is going to validate certs while connecting to PowerFlex REST API interface. | true     | true    |
     | isDefault | An array having isDefault=true is for backward compatibility. This parameter should occur once in the list. | false    | false   |
     | mdm       | mdm defines the MDM(s) that SDC should register with on start. This should be a list of MDM IP addresses or hostnames separated by comma. | true     | -       |
-    | nasName       | nasName defines what NAS should be used for NFS volumes. NFS volumes are supported on arrays version 4.0.x | false     | none       |
+    | nasName       | nasName defines what NAS should be used for NFS volumes. NFS volumes are supported on arrays version >=4.0.x | false     | ""       |
 
     Example: `samples/secret.yaml`