hash: fix Doxygen comment of Toeplitz file

Fixes: 7574c3e ("hash: add toeplitz algorithm used by RSS")
Cc: stable@dpdk.org

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Acked-by: John McNamara <john.mcnamara@intel.com>

lib/hash/rte_thash.h

@@ -9,20 +9,16 @@
 /**
  * @file
  *
- * toeplitz hash functions.
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
  * Software implementation of the Toeplitz hash function used by RSS.
  * Can be used either for packet distribution on single queue NIC
  * or for simulating of RSS computation on specific NIC (for example
  * after GRE header decapsulating)
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 #include <rte_byteorder.h>
 #include <rte_config.h>