boards: steval_fcu001v1: Use dts for clocks configuration

Convert board to use of device tree for clocks configuration.

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>
diff --git a/boards/arm/steval_fcu001v1/steval_fcu001v1.dts b/boards/arm/steval_fcu001v1/steval_fcu001v1.dts
index 0f5d45f..c6a9c1e 100644
--- a/boards/arm/steval_fcu001v1/steval_fcu001v1.dts
+++ b/boards/arm/steval_fcu001v1/steval_fcu001v1.dts
@@ -38,6 +38,28 @@
 	};
 };
 
+&clk_hse {
+	clock-frequency = <DT_FREQ_M(16)>;
+	status = "okay";
+};
+
+&pll {
+	div-m = <16>;
+	mul-n = <336>;
+	div-p = <4>;
+	div-q = <7>;
+	clocks = <&clk_hse>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(84)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <2>;
+	apb2-prescaler = <1>;
+};
+
 &i2c2 {
 	pinctrl-0 = <&i2c2_sda_pb3 &i2c2_scl_pb10>;
 	status = "okay";
diff --git a/boards/arm/steval_fcu001v1/steval_fcu001v1_defconfig b/boards/arm/steval_fcu001v1/steval_fcu001v1_defconfig
index 7532d77..be28532 100644
--- a/boards/arm/steval_fcu001v1/steval_fcu001v1_defconfig
+++ b/boards/arm/steval_fcu001v1/steval_fcu001v1_defconfig
@@ -3,9 +3,6 @@
 CONFIG_SOC_SERIES_STM32F4X=y
 CONFIG_SOC_STM32F401XC=y
 
-# 84MHz system clock
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=84000000
-
 # Enable MPU
 CONFIG_ARM_MPU=y
 
@@ -21,23 +18,5 @@
 # enable GPIO
 CONFIG_GPIO=y
 
-# clock configuration
+# Enable Clocks
 CONFIG_CLOCK_CONTROL=y
-
-# SYSCLK selection
-CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
-
-# use HSE as PLL input
-CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
-CONFIG_CLOCK_STM32_HSE_CLOCK=16000000
-
-# produce 84MHz clock at PLL output
-CONFIG_CLOCK_STM32_PLL_M_DIVISOR=16
-CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=336
-CONFIG_CLOCK_STM32_PLL_P_DIVISOR=4
-CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=7
-CONFIG_CLOCK_STM32_AHB_PRESCALER=1
-
-# APB1 clock must not exceed 50MHz limit
-CONFIG_CLOCK_STM32_APB1_PRESCALER=2
-CONFIG_CLOCK_STM32_APB2_PRESCALER=1