clk: stm32f4: Use CLK_OF_DECLARE_DRIVER initialization method

Clock and reset controller use same compatible strings (same IP).

Since commit 989eafd0 ("clk: core: Avoid double initialization of
clocks") the OF core flags clock controllers registered with the
CLK_OF_DECLARE() macro as OF_POPULATED, so platform devices with the same
compatible string will not be registered.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/clk-stm32f4.c

@@ -768,5 +768,5 @@ static void __init stm32f4_rcc_init(struct device_node *np)
 	kfree(clks);
 	iounmap(base);
 }
-CLK_OF_DECLARE(stm32f42xx_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init);
-CLK_OF_DECLARE(stm32f46xx_rcc, "st,stm32f469-rcc", stm32f4_rcc_init);
+CLK_OF_DECLARE_DRIVER(stm32f42xx_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init);
+CLK_OF_DECLARE_DRIVER(stm32f46xx_rcc, "st,stm32f469-rcc", stm32f4_rcc_init);