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/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index d732661..a1655e1 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -30,7 +30,7 @@
  * identify so that CPU functions can be used correctly, but does not change
  * anything.
  *
- * @return 0 (indicating success, to mimic cpu_init_f())
+ * Return: 0 (indicating success, to mimic cpu_init_f())
  */
 int x86_cpu_reinit_f(void);
 
@@ -39,7 +39,7 @@
  *
  * This just sets up the CPU features and figured out the identity
  *
- * @return 0 (indicating success, to mimic cpu_init_f())
+ * Return: 0 (indicating success, to mimic cpu_init_f())
  */
 int x86_cpu_init_tpl(void);