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/cpu_x86.h b/arch/x86/include/asm/cpu_x86.h
index 4fd5f03..7d04977 100644
--- a/arch/x86/include/asm/cpu_x86.h
+++ b/arch/x86/include/asm/cpu_x86.h
@@ -13,7 +13,7 @@
  * like the processor local apic id.
  *
  * @dev:	Device to check (UCLASS_CPU)
- * @return	0 always
+ * Return:	0 always
  */
 int cpu_x86_bind(struct udevice *dev);