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/log.h b/include/log.h
index e0e12ce..ce48d51 100644
--- a/include/log.h
+++ b/include/log.h
@@ -660,7 +660,7 @@
  *
  * @drv: Driver of device to enable
  * @enable: true to enable, false to disable
- * @return 0 if OK, -ENOENT if the driver was not found
+ * Return: 0 if OK, -ENOENT if the driver was not found
  */
 int log_device_set_enable(struct log_driver *drv, bool enable);