On single NUMA device the log information shows as boundary value
instead of -1. The change brings in unsigned to signed.
Fixes: 4c173302c307 ("pcap: add new driver")
Signed-off-by: Vipin Varghese <vipin.varghese@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>