code clean for the if condition , and reuse some logic.

[yanggangtony]

Signed-off-by: yanggang gang.yang@daocloud.io

/kind cleanup

Just cleanup if logic for parm value.

[anderseknert]

Thanks for submitting this, but I'm afraid I don't see this as an improvement — i.e. it does not help in making the code more readable. If you'd like to contribute on something bigger, check out the "good first issue" label. Thanks!