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-tegra/warmboot.h b/arch/arm/include/asm/arch-tegra/warmboot.h
index 3f02073..bfde4c3 100644
--- a/arch/arm/include/asm/arch-tegra/warmboot.h
+++ b/arch/arm/include/asm/arch-tegra/warmboot.h
@@ -121,7 +121,7 @@
 /**
  * Save warmboot memory settings for a later resume
  *
- * @return 0 if ok, -1 on error
+ * Return: 0 if ok, -1 on error
  */
 int warmboot_save_sdram_params(void);