qlcnic: eswitch config fixes

o remove validation before deleting vlan id
o Add missing 'break' while deleting vlan id.

Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>