app/procinfo: call EAL cleanup before exit

This patch adds a call to the newly introduced cleanup()
function just before quitting the app.

Adding this function call before quitting from a secondary processes
is important, as otherwise it will leak hugepage memory. For a secondary
process that is run multiple times, this could cause hugepage memory
to become depleted and stop a secondary process from starting.

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Vipin Varghese <vipin.varghese@intel.com>

app/proc_info/main.c

@@ -660,5 +660,9 @@ main(int argc, char **argv)
 	if (enable_metrics)
 		metrics_display(RTE_METRICS_GLOBAL);
 
+	ret = rte_eal_cleanup();
+	if (ret)
+		printf("Error from rte_eal_cleanup(), %d\n", ret);
+
 	return 0;
 }