doxygen: fix parameter name typos and misused \p commands

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/include/mbedtls/ssl_cache.h b/include/mbedtls/ssl_cache.h
index b1b4250..7a90191 100644
--- a/include/mbedtls/ssl_cache.h
+++ b/include/mbedtls/ssl_cache.h
@@ -137,7 +137,7 @@
  *
  * \param data            The SSL cache context to use.
  * \param session_id      The pointer to the buffer holding the session ID
- *                        associated to \p session.
+ *                        associated to session.
  * \param session_id_len  The length of \p session_id in bytes.
  *
  * \return                \c 0 on success. This indicates the cache entry for