Previously, max_socket was set to the highest numbered socket with
an enabled lcore. The intent is to set it to the highest socket
regardless of it being enabled.
Fixes: 7acf894d07d1 ("app/testpmd: detect numa socket count")
Signed-off-by: Stephen Hurd <shurd@broadcom.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>