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-tegra20/emc.h b/arch/arm/include/asm/arch-tegra20/emc.h
index 58ee08c..65d0e34 100644
--- a/arch/arm/include/asm/arch-tegra20/emc.h
+++ b/arch/arm/include/asm/arch-tegra20/emc.h
@@ -81,7 +81,7 @@
  *
  * @param blob	Device tree blob
  * @param rate	Clock speed of memory controller in Hz (=2x memory bus rate)
- * @return 0 if ok, else -ve error code (look in emc.c to decode it)
+ * Return: 0 if ok, else -ve error code (look in emc.c to decode it)
  */
 int tegra_set_emc(const void *blob, unsigned rate);
 
@@ -89,7 +89,7 @@
  * Get a pointer to the EMC controller from the device tree.
  *
  * @param blob	Device tree blob
- * @return pointer to EMC controller
+ * Return: pointer to EMC controller
  */
 struct emc_ctlr *emc_get_controller(const void *blob);