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/spl/spl.c b/common/spl/spl.c
index c5360f3..4bb9455 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -446,7 +446,7 @@
  * get_bootstage_id() - Get the bootstage ID to emit
  *
  * @start: true if this is for starting SPL, false for ending it
- * @return bootstage ID to use
+ * Return: bootstage ID to use
  */
 static enum bootstage_id get_bootstage_id(bool start)
 {
@@ -617,7 +617,7 @@
  * @spl_image: Place to put the image details if successful
  * @spl_boot_list: List of boot devices to try
  * @count: Number of elements in spl_boot_list
- * @return 0 if OK, -ENODEV if there were no boot devices
+ * Return: 0 if OK, -ENODEV if there were no boot devices
  *	if CONFIG_SHOW_ERRORS is enabled, returns -ENXIO if there were
  *	devices but none worked
  */
@@ -883,7 +883,7 @@
  * All of this is done using the same layout and alignments as done in
  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
  *
- * @return new stack location, or 0 to use the same stack
+ * Return: new stack location, or 0 to use the same stack
  */
 ulong spl_relocate_stack_gd(void)
 {