Prefer GCMP-256 over CCMP-256 as the pairwise/group cipher

Prefer GCMP-256 over CCMP-256 as the pairwise/group cipher

While there is not any significant reason from the protocol or security
view points, there is significant difference in how much testing and
deployment there has been for these cipher suites. GCMP-256 is the
expected cipher suite to be used for new Wi-Fi 7 deployments and there
is more or less no deploymeny of CCMP-256 or plans for trying to change
that.

While selecting either option in cases where both ciphers have been
enabled, likelihood of interoperability issues due to limited testing is
higher with CCMP-256. As such, prefer GCMP-256 over it whenever there is
option to select either of those two ciphers.

Signed-off-by: Jouni Malinen <quic_jouni@quicinc.com>