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_driver.c b/drivers/net/pfe_eth/pfe_driver.c
index 6f443b4..5e14f82 100644
--- a/drivers/net/pfe_eth/pfe_driver.c
+++ b/drivers/net/pfe_eth/pfe_driver.c
@@ -25,7 +25,7 @@
  * @param[out] pkt_ptr - Pointer to store rx packet
  * @param[out] phy_port - Pointer to store recv phy port
  *
- * @return -1 if no packet, else return length of packet.
+ * Return: -1 if no packet, else return length of packet.
  */
 int pfe_recv(uchar **pkt_ptr, int *phy_port)
 {
@@ -121,7 +121,7 @@
  * @param[in] data	Pointer to the data
  * @param[in] length	Length of the ethernet packet to be transferred.
  *
- * @return -1 if tx Q is full, else returns the tx location where the pkt is
+ * Return: -1 if tx Q is full, else returns the tx location where the pkt is
  * placed.
  */
 int pfe_send(int phy_port, void *data, int length)
@@ -190,7 +190,7 @@
  *  locations
  *  if success, moves the tx_to_send to next location.
  *
- * @return -1 if TX ownership bit is not cleared by hw.
+ * Return: -1 if TX ownership bit is not cleared by hw.
  * else on success (tx done completion) return zero.
  */
 int pfe_tx_done(void)
@@ -557,7 +557,7 @@
  *
  * @param[in]	edev	Pointer to eth device structure.
  *
- * @return 0, on success.
+ * Return: 0, on success.
  */
 static int pfe_hw_init(struct pfe_ddr_address *pfe_addr)
 {