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/include/phy-sun4i-usb.h b/include/phy-sun4i-usb.h
index b0a45b2..c37c593 100644
--- a/include/phy-sun4i-usb.h
+++ b/include/phy-sun4i-usb.h
@@ -11,7 +11,7 @@
  * sun4i_usb_phy_id_detect - detect ID pin of USB PHY
  *
  * @phy:	USB PHY port to detect ID pin
- * @return 0 if OK, or a negative error code
+ * Return: 0 if OK, or a negative error code
  */
 int sun4i_usb_phy_id_detect(struct phy *phy);
 
@@ -19,7 +19,7 @@
  * sun4i_usb_phy_vbus_detect - detect VBUS pin of USB PHY
  *
  * @phy:	USB PHY port to detect VBUS pin
- * @return 0 if OK, or a negative error code
+ * Return: 0 if OK, or a negative error code
  */
 int sun4i_usb_phy_vbus_detect(struct phy *phy);