ib_acme: Add support for endpoint specific performance query.

ib_acme: Add support for endpoint specific performance query.

Adds the following queries to ib_acme tool:

  ib_acme -P N
    to query the performance for a specific endpoint N (N = 1, 2, ...);
  ib_acme -P all
    to query the performance for all endpoints;
  ib_acme -f [n | i] -s [src name | ip addr] -P s
    to query the performance for a specific endpoint with the given address.

in addition to the normal query for overal (combined) performance:

  ib_acme -P
  ib_acme -P col

Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>