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_firmware.c b/drivers/net/pfe_eth/pfe_firmware.c
index 93e5ea5..6669048 100644
--- a/drivers/net/pfe_eth/pfe_firmware.c
+++ b/drivers/net/pfe_eth/pfe_firmware.c
@@ -37,7 +37,7 @@
  * @param pe_mask	Mask of PE id's to load firmware to
  * @param pfe_firmware	Pointer to the firmware image
  *
- * @return		0 on success, a negative value on error
+ * Return:		0 on success, a negative value on error
  */
 static int pfe_load_elf(int pe_mask, uint8_t *pfe_firmware)
 {
@@ -99,7 +99,7 @@
  * @param size pointer to size of the firmware
  * @param fw_name pfe firmware name, either class or tmu
  *
- * @return 0 on success, a negative value on error
+ * Return: 0 on success, a negative value on error
  */
 static int pfe_get_fw(const void **data,
 		      size_t *size, char *fw_name)
@@ -148,7 +148,7 @@
 /*
  * Check PFE FIT image
  *
- * @return 0 on success, a negative value on error
+ * Return: 0 on success, a negative value on error
  */
 static int pfe_fit_check(void)
 {
@@ -248,7 +248,7 @@
  * firmware files
  * Takes PE's out of reset
  *
- * @return 0 on success, a negative value on error
+ * Return: 0 on success, a negative value on error
  */
 int pfe_firmware_init(void)
 {