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/tools/rkcommon.h b/tools/rkcommon.h
index 9351882..49b6df3 100644
--- a/tools/rkcommon.h
+++ b/tools/rkcommon.h
@@ -19,7 +19,7 @@
 /**
  * rkcommon_check_params() - check params
  *
- * @return 0 if OK, -1 if ERROR.
+ * Return: 0 if OK, -1 if ERROR.
  */
 int rkcommon_check_params(struct image_tool_params *params);
 
@@ -56,7 +56,7 @@
  *
  * @buf:	Pointer to the image file
  * @file_size:	Size of entire bootable image file (incl. all padding)
- * @return 0 if OK
+ * Return: 0 if OK
  */
 int rkcommon_verify_header(unsigned char *buf, int size,
 			   struct image_tool_params *params);
@@ -76,7 +76,7 @@
  * Some socs cannot disable the rc4-encryption of the spl binary.
  * rc4 encryption is disabled normally except on socs that cannot
  * handle unencrypted binaries.
- * @return true or false depending on rc4 being required.
+ * Return: true or false depending on rc4 being required.
  */
 bool rkcommon_need_rc4_spl(struct image_tool_params *params);
 
@@ -99,7 +99,7 @@
  * @tparams:    Pointer tot the image type structure (for setting
  *              the header and header_size)
  *
- * @return 0 (always)
+ * Return: 0 (always)
  */
 int rkcommon_vrec_header(struct image_tool_params *params,
 			 struct image_type_params *tparams);