Added check for MUT_AUTH_CAP in encapsulated request

Author: JakubLedworowski

library/spdm_requester_lib/libspdm_req_encap_request.c

@@ -147,7 +147,11 @@ libspdm_return_t libspdm_encapsulated_request(libspdm_context_t *spdm_context,
     if (!libspdm_is_capabilities_flag_supported(
             spdm_context, true,
             SPDM_GET_CAPABILITIES_REQUEST_FLAGS_ENCAP_CAP,
-            SPDM_GET_CAPABILITIES_RESPONSE_FLAGS_ENCAP_CAP)) {
+            SPDM_GET_CAPABILITIES_RESPONSE_FLAGS_ENCAP_CAP) &&
+            !libspdm_is_capabilities_flag_supported(
+            spdm_context, true,
+            SPDM_GET_CAPABILITIES_REQUEST_FLAGS_MUT_AUTH_CAP,
+            SPDM_GET_CAPABILITIES_RESPONSE_FLAGS_MUT_AUTH_CAP)) {
         return LIBSPDM_STATUS_UNSUPPORTED_CAP;
     }