SAE: Move H2E and PK flags to main sae_data

SAE: Move H2E and PK flags to main sae_data

This maintains knowledge of whether H2E or PK was used as part of the
SAE authentication beyond the removal of temporary state needed during
that authentication. This makes it easier to use information about which
kind of SAE authentication was used at higher layer functionality.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>