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/smbios.h b/include/smbios.h
index acfcbfe..c9df270 100644
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -271,7 +271,7 @@
  * main loop has started) to update the BIOS version string (SMBIOS table 0).
  *
  * @version: New version string to use
- * @return 0 if OK, -ENOENT if no version string was previously written,
+ * Return: 0 if OK, -ENOENT if no version string was previously written,
  *	-ENOSPC if the new string is too large to fit
  */
 int smbios_update_version(const char *version);
@@ -287,7 +287,7 @@
  *
  * @smbios_tab: Start of SMBIOS tables
  * @version: New version string to use
- * @return 0 if OK, -ENOENT if no version string was previously written,
+ * Return: 0 if OK, -ENOENT if no version string was previously written,
  *	-ENOSPC if the new string is too large to fit
  */
 int smbios_update_version_full(void *smbios_tab, const char *version);