soc: stm32f0: Add support for STM32F098xx SOC

This adds a Kconfig options and device tree configs for the STM32F098
series of SoC.

Signed-off-by: Jack Rosenthal <[email protected]>

Author: jackrosenthal

dts/arm/st/f0/stm32f098Xc.dtsi

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2019 The Chromium OS Authors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <mem.h>
+#include <st/f0/stm32f091.dtsi>
+
+/ {
+	sram0: memory@20000000 {
+		reg = <0x20000000 DT_SIZE_K(32)>;
+	};
+
+	soc {
+		flash-controller@40022000 {
+			flash0: flash@8000000 {
+				reg = <0x08000000 DT_SIZE_K(256)>;
+			};
+		};
+	};
+};

soc/arm/st_stm32/stm32f0/Kconfig.defconfig.stm32f098xx

@@ -0,0 +1,14 @@
+# ST Microelectronics STM32F098XX MCU
+
+# Copyright (c) 2019 The Chromium OS Authors
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_STM32F098XX
+
+config SOC
+	default "stm32f098xx"
+
+config NUM_IRQS
+	default 31
+
+endif # SOC_STM32F098xx

soc/arm/st_stm32/stm32f0/Kconfig.soc

@@ -25,4 +25,7 @@ config SOC_STM32F072XB
 config SOC_STM32F091XC
 	bool "STM32F091XC"
 
+config SOC_STM32F098XX
+	bool "STM32F098XX"
+
 endchoice