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/arch/arm/include/asm/arch-hi6220/pinmux.h b/arch/arm/include/asm/arch-hi6220/pinmux.h
index b4a9957..d18d214 100644
--- a/arch/arm/include/asm/arch-hi6220/pinmux.h
+++ b/arch/arm/include/asm/arch-hi6220/pinmux.h
@@ -74,7 +74,7 @@
  * pull-up/down and drive strength.
  *
  * @param peripheral	peripheral to be configured
- * @return 0 if ok, -1 on error (e.g. unsupported peripheral)
+ * Return: 0 if ok, -1 on error (e.g. unsupported peripheral)
  */
 int hi6220_pinmux_config(int peripheral);