doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/arch/mips/mach-octeon/cvmx-helper-util.c b/arch/mips/mach-octeon/cvmx-helper-util.c
index 4625b45..92298fd 100644
--- a/arch/mips/mach-octeon/cvmx-helper-util.c
+++ b/arch/mips/mach-octeon/cvmx-helper-util.c
@@ -132,7 +132,7 @@
  *
  * @param mode   Mode to convert
  *
- * @return String
+ * Return: String
  */
 const char *cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t mode)
 {
@@ -729,7 +729,7 @@
  * @param drop_thresh
  *               All incoming packets will be dropped when there are less
  *               than this many free packet buffers in FPA 0.
- * @return Zero on success. Negative on failure
+ * Return: Zero on success. Negative on failure
  */
 int cvmx_helper_setup_red(int pass_thresh, int drop_thresh)
 {
@@ -749,7 +749,7 @@
  * @param xiface Interface to configure
  * @param num_ports Number of ports on the interface
  *
- * @return Zero on success, negative on failure
+ * Return: Zero on success, negative on failure
  */
 int __cvmx_helper_setup_gmx(int xiface, int num_ports)
 {
@@ -984,7 +984,7 @@
  *
  * @param port IPD/PKO port number
  *
- * @return none
+ * Return: none
  */
 void cvmx_helper_show_stats(int port)
 {
@@ -1013,7 +1013,7 @@
  *
  * @param ipd_port IPD/PKO port number
  *
- * @return Interface number
+ * Return: Interface number
  */
 int cvmx_helper_get_interface_num(int ipd_port)
 {
@@ -1096,7 +1096,7 @@
  *
  * @param ipd_port IPD/PKO port number
  *
- * @return Interface index number
+ * Return: Interface index number
  */
 int cvmx_helper_get_interface_index_num(int ipd_port)
 {