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/drivers/clk/aspeed/clk_ast2500.c b/drivers/clk/aspeed/clk_ast2500.c
index 97f00f5..a1b4496 100644
--- a/drivers/clk/aspeed/clk_ast2500.c
+++ b/drivers/clk/aspeed/clk_ast2500.c
@@ -91,7 +91,7 @@
  * @scu SCU registers
  * @uart_index UART index, 1-5
  *
- * @return current setting for uart clock rate
+ * Return: current setting for uart clock rate
  */
 static ulong ast2500_get_uart_clk_rate(struct ast2500_scu *scu, int uart_index)
 {
@@ -216,7 +216,7 @@
  * The result (the best config we could find), would also be returned
  * in this structure.
  *
- * @return The clock rate, when the resulting div_config is used.
+ * Return: The clock rate, when the resulting div_config is used.
  */
 static ulong ast2500_calc_clock_config(ulong input_rate, ulong requested_rate,
 				       struct ast2500_div_config *cfg)