examples/l3fwd-power: disable link status interrupt
examples/l3fwd-power: disable link status interrupt

This application does not need Link Status Interrupt.
It will cause failure for the platforms not supporting LSC.

Signed-off-by: Nikhil Agarwal <9f0a6a282cf92289ac89d0b0d2672ea738b6959b@linaro.org>
Acked-by: David Hunt <763be7c8e0ad91e03160e7aed76d5cd41534e2f9@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk