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/sound/maxim_codec.c b/drivers/sound/maxim_codec.c
index 31e67ee..6553d95 100644
--- a/drivers/sound/maxim_codec.c
+++ b/drivers/sound/maxim_codec.c
@@ -22,7 +22,7 @@
  * @param reg	reg number to be write
  * @param data	data to be writen to the above registor
  *
- * @return	int value 1 for change, 0 for no change or negative error code.
+ * Return:	int value 1 for change, 0 for no change or negative error code.
  */
 int maxim_i2c_write(struct maxim_priv *priv, unsigned int reg,
 		    unsigned char data)
@@ -39,7 +39,7 @@
  * @param reg	reg number to be read
  * @param data	address of read data to be stored
  *
- * @return	int value 0 for success, -1 in case of error.
+ * Return:	int value 0 for success, -1 in case of error.
  */
 unsigned int maxim_i2c_read(struct maxim_priv *priv, unsigned int reg,
 			    unsigned char *data)
@@ -64,7 +64,7 @@
  * @param mask	register mask
  * @param value	new value
  *
- * @return int value 0 for success, non-zero error code.
+ * Return: int value 0 for success, non-zero error code.
  */
 int maxim_bic_or(struct maxim_priv *priv, unsigned int reg, unsigned char mask,
 		 unsigned char value)