mach-stm32: Enable SPL_RESET_SUPPORT flag

Since commit 0e373c0a ("spl: add SPL_RESET_SUPPORT"),
reset is supported in SPL, enable this flag for STM32F SoCs family.

This allows to remove a specific case in RCC mfd driver.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

arch/arm/mach-stm32/Kconfig

@@ -48,6 +48,7 @@ config STM32F7
 	imply SPL_OS_BOOT
 	select SPL_PINCTRL
 	select SPL_RAM
+	select SPL_RESET_SUPPORT
 	select SPL_SERIAL_SUPPORT
 	select SPL_SYS_MALLOC_SIMPLE
 	select SPL_TIMER

drivers/misc/stm32_rcc.c

@@ -53,13 +53,9 @@ static int stm32_rcc_bind(struct udevice *dev)
 	if (ret)
 		return ret;
 
-#ifdef CONFIG_SPL_BUILD
-	return 0;
-#else
 	return device_bind_driver_to_node(dev, "stm32_rcc_reset",
 					  "stm32_rcc_reset",
 					  dev_ofnode(dev), &child);
-#endif
 }
 
 static const struct misc_ops stm32_rcc_ops = {