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/include/spmi/spmi.h b/include/spmi/spmi.h
index 3242e6b..3f8bba1 100644
--- a/include/spmi/spmi.h
+++ b/include/spmi/spmi.h
@@ -26,7 +26,7 @@
  * @usid	SlaveID
  * @pid		Peripheral ID
  * @reg:	Register to read
- * @return value read on success or negative value of errno.
+ * Return: value read on success or negative value of errno.
  */
 int spmi_reg_read(struct udevice *dev, int usid, int pid, int reg);
 
@@ -38,7 +38,7 @@
  * @pid		Peripheral ID
  * @reg:	Register to write
  * @value:	Value to write
- * @return 0 on success or negative value of errno.
+ * Return: 0 on success or negative value of errno.
  */
 int spmi_reg_write(struct udevice *dev, int usid, int pid, int reg,
 		   uint8_t value);