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/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c
index 2738dc8..2710879 100644
--- a/drivers/fastboot/fb_mmc.c
+++ b/drivers/fastboot/fb_mmc.c
@@ -289,7 +289,7 @@
  * @param[in] info Boot partition info
  * @param[out] hdr Where to store read boot image header
  *
- * @return Boot image header sectors count or 0 on error
+ * Return: Boot image header sectors count or 0 on error
  */
 static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
 				       struct disk_partition *info,
@@ -336,7 +336,7 @@
  * @param download_buffer Address to fastboot buffer with zImage in it
  * @param download_bytes Size of fastboot buffer, in bytes
  *
- * @return 0 on success or -1 on error
+ * Return: 0 on success or -1 on error
  */
 static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 				void *download_buffer,