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/x86/include/asm/arch-apollolake/systemagent.h b/arch/x86/include/asm/arch-apollolake/systemagent.h
index 48e76c2..25dbc9c 100644
--- a/arch/x86/include/asm/arch-apollolake/systemagent.h
+++ b/arch/x86/include/asm/arch-apollolake/systemagent.h
@@ -45,7 +45,7 @@
  * below 4GB
  *
  * @dev: hostbridge device
- * @return TOLUD address
+ * Return: TOLUD address
  */
 ulong sa_get_tolud_base(struct udevice *dev);
 
@@ -56,7 +56,7 @@
  * for Graphics Translation Tables.
  *
  * @dev: hostbridge device
- * @return GSM address
+ * Return: GSM address
  */
 ulong sa_get_gsm_base(struct udevice *dev);
 
@@ -65,7 +65,7 @@
  *
  * This returns the top address of DRAM available below 4GB
  *
- * @return TSEG base
+ * Return: TSEG base
  */
 ulong sa_get_tseg_base(struct udevice *dev);