hsa: add periodic reports to builtin echo client

hsa: add periodic reports to builtin echo client

report-interval now enables periodic reports, which display TX/RX stats,
as well as throughput and sent/recv datagrams if running over UDP.
It also features a -total variant, which displays same data, but as
totals counted from test start time.

Type: improvement
Change-Id: I28dd1a0c8bfbcaf2882a102433ce4acf28b3d6ef
Signed-off-by: Semir Sionek <[email protected]>