app/testpmd: fix reconfig flag for all ports
app/testpmd: fix reconfig flag for all ports

When port id is RTE_PORT_ALL, port_id_is_invalid will also return zero.
So this function will only set ports[255] need_reconfig flag, other ports will
be skipped.

Fixes: edab33b1c01d ("app/testpmd: support port hotplug")

Signed-off-by: Marvin Liu <d89ea4150d91f674af88bbc382d184dd42ea906c@intel.com>
Acked-by: Changchun Ouyang <593bf1f161e79772915ea885e47cf0e95f4498c0@intel.com>

msune/dpdk,john-mcnamara-intel/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,venkynv/dpdk-mirror,tsphillips/dpdk-fork,venkynv/dpdk-mirror,mixja/dpdk,tsphillips/dpdk-fork,tsphillips/dpdk-fork,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,msune/dpdk,mixja/dpdk,tsphillips/dpdk-fork,mixja/dpdk,msune/dpdk,msune/dpdk