package/qt5base: select mandatory libopenssl PSK feature

package/qt5base: select mandatory libopenssl PSK feature

Fixes:

  - http://autobuild.buildroot.net/results/24230242c15eb379d653c957a08621f8a1fac55e

  ssl/qdtls_openssl.cpp: In member function ‘bool dtlsopenssl::DtlsState::initCtxAndConnection(QDtlsBasePrivate*)’:
  ssl/qdtls_openssl.cpp:717:9: error: ‘q_SSL_set_psk_server_callback’ was not declared in this scope; did you mean ‘q_SSL_set_psk_use_session_callback’?
    717 |         q_SSL_set_psk_server_callback(newConnection.data(), dtlscallbacks::q_PSK_server_callback);
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        |         q_SSL_set_psk_use_session_callback
  ssl/qdtls_openssl.cpp:719:9: error: ‘q_SSL_set_psk_client_callback’ was not declared in this scope; did you mean ‘q_SSL_set_psk_use_session_callback’?
    719 |         q_SSL_set_psk_client_callback(newConnection.data(), dtlscallbacks::q_PSK_client_callback);
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        |         q_SSL_set_psk_use_session_callback

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>