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/scripts/dtc/libfdt/fdt_rw.c b/scripts/dtc/libfdt/fdt_rw.c
index 08e2981..2eb2b38 100644
--- a/scripts/dtc/libfdt/fdt_rw.c
+++ b/scripts/dtc/libfdt/fdt_rw.c
@@ -123,7 +123,7 @@
  * @s: string to find/add
  * @allocated: Set to 0 if the string was found, 1 if not found and so
  *	allocated. Ignored if !fdt_chk_basic()
- * @return offset of string in the string table (whether found or added)
+ * Return: offset of string in the string table (whether found or added)
  */
 static int fdt_find_add_string_(void *fdt, const char *s, int *allocated)
 {
diff --git a/scripts/dtc/libfdt/libfdt.h b/scripts/dtc/libfdt/libfdt.h
index 421f90a..d706f85 100644
--- a/scripts/dtc/libfdt/libfdt.h
+++ b/scripts/dtc/libfdt/libfdt.h
@@ -152,7 +152,7 @@
  *
  * @fdt:	FDT blob
  * @offset:	Offset of node to check
- * @return offset of first subnode, or -FDT_ERR_NOTFOUND if there is none
+ * Return: offset of first subnode, or -FDT_ERR_NOTFOUND if there is none
  */
 int fdt_first_subnode(const void *fdt, int offset);
 
@@ -164,7 +164,7 @@
  *
  * @fdt:	FDT blob
  * @offset:	Offset of previous subnode
- * @return offset of next subnode, or -FDT_ERR_NOTFOUND if there are no more
+ * Return: offset of next subnode, or -FDT_ERR_NOTFOUND if there are no more
  * subnodes
  */
 int fdt_next_subnode(const void *fdt, int offset);