net/bnxt: check for VNIC ID in rollback

net/bnxt: check for VNIC ID in rollback

If driver init/probe fails as part of cleanup/rollback, we may end
up invoking this HWRM cmd even on an invalid vNIC which will
unnecessarily log an error message as the cmd will fail.
Check for invalid ID before issuing the HWRM cmd

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Rahul Gupta <rahul.gupta@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>