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/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index 0540b02..89312a8 100644
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -39,7 +39,7 @@
  * pch_silicon_revision() - Read silicon revision ID from the PCH
  *
  * @dev:	PCH device
- * @return silicon revision ID
+ * Return: silicon revision ID
  */
 static int pch_silicon_revision(struct udevice *dev)
 {
@@ -71,7 +71,7 @@
  * @dev:	PCH device
  * @type:	PCH type
  * @rev:	Minimum required resion
- * @return 0 if not supported, 1 if supported
+ * Return: 0 if not supported, 1 if supported
  */
 static int pch_silicon_supported(struct udevice *dev, int type, int rev)
 {