boards: oct: osd32mp1_brk: provide HSE clock frequency in DTS

Provide the HSE clock frequency by enabling and configuring its Device Tree
node in the board's DTS instead of using Kconfig.

Signed-off-by: Mathieu Choplain <mathieu.choplain-ext@st.com>

boards/oct/osd32mp1_brk/Kconfig.defconfig

@@ -7,7 +7,4 @@ config SPI_STM32_INTERRUPT
 	default y
 	depends on SPI
 
-config CLOCK_STM32_HSE_CLOCK
-	default 24000000
-
 endif # BOARD_OSD32MP1_BRK

boards/oct/osd32mp1_brk/osd32mp1_brk.dts

@@ -52,6 +52,11 @@
 	};
 };
 
+&clk_hse {
+	clock-frequency = <DT_FREQ_M(24)>;
+	status = "okay";
+};
+
 &spi4_miso_pe13 {
 	slew-rate = "very-high-speed";
 };