iperf3: upgrade 3.21 -> 3.22

Notable user-visible changes:
- Attempting to set zero parallel streams is no longer allowed.
- Zerocopy and rx-copy are now allowed in the case of reverse
  direction tests and the server (sending side) supports these
  features but the client (receiving side) does not.
- The limit on GSO_MAX_DG_IN_BF was fixed to limit the number of segments
  to the maximum allowed. This change unbreaks GSO for small message sizes.

Changelog:
https://github.com/esnet/iperf/releases/tag/3.22

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-benchmark/iperf3/iperf3_3.22.bb

@@ -17,7 +17,7 @@ SRC_URI = "git://github.com/esnet/iperf.git;branch=master;protocol=https;tag=${P
            file://0001-configure.ac-check-for-CPP-prog.patch \
           "
 
-SRCREV = "d39cf41526626b4e5a130f115d931cd6cbdffc19"
+SRCREV = "926bd905501b792bd082d2200d1d1a84aa543e3a"
 
 RDEPENDS:${PN} = "libgcc"