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/drivers/net/pfe_eth/pfe_eth.c b/drivers/net/pfe_eth/pfe_eth.c
index 0c27a66..d338b36 100644
--- a/drivers/net/pfe_eth/pfe_eth.c
+++ b/drivers/net/pfe_eth/pfe_eth.c
@@ -101,7 +101,7 @@
  *
  * @param[in]   edev    Pointer to eth device structure.
  *
- * @return      none
+ * Return:      none
  */
 static inline void pfe_eth_stop(struct udevice *dev)
 {