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)
diff --git a/drivers/clk/aspeed/clk_ast2600.c b/drivers/clk/aspeed/clk_ast2600.c
index 3fb8d68..f191b0f 100644
--- a/drivers/clk/aspeed/clk_ast2600.c
+++ b/drivers/clk/aspeed/clk_ast2600.c
@@ -481,7 +481,7 @@
 /**
  * @brief	lookup PLL divider config by input/output rate
  * @param[in]	*pll - PLL descriptor
- * @return	true - if PLL divider config is found, false - else
+ * Return:	true - if PLL divider config is found, false - else
  * The function caller shall fill "pll->in" and "pll->out",
  * then this function will search the lookup table
  * to find a valid PLL divider configuration.