fix bugs when add volume with same pvc.

Created by: smile-luobin

Signed-off-by: smile-luobin smile.luobin@gmail.com

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

fix #3571

Special notes for reviewers:

Does this PR introduced a user-facing change?

NONE

Additional documentation, usage docs, etc.:

NONE