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/common/log.c b/common/log.c
index 1aaa6c1..f7e0c0f 100644
--- a/common/log.c
+++ b/common/log.c
@@ -147,7 +147,7 @@
  *
  * @ldev: Log device to check
  * @rec: Log record to check
- * @return true if @rec is not blocked by the filters in @ldev, false if it is
+ * Return: true if @rec is not blocked by the filters in @ldev, false if it is
  */
 static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec)
 {
@@ -390,7 +390,7 @@
  * log_find_device_by_drv() - Find a device by its driver
  *
  * @drv: Log driver
- * @return Device associated with that driver, or NULL if not found
+ * Return: Device associated with that driver, or NULL if not found
  */
 static struct log_device *log_find_device_by_drv(struct log_driver *drv)
 {