arm: stm32f1: Add support for STM32F103x8 SoC

Add configuration and memory definitions to support STM32F103x8
Medium-density performance line SoC with 64 KB Flash.

Merge multiple files into single Kconfig.defconfig.stm32f103xx

Signed-off-by: Siddharth Chandrasekaran <siddharth@embedjournal.com>

arch/arm/soc/st_stm32/stm32f1/Kconfig.defconfig.stm32f103xb

@@ -1,19 +0,0 @@
-# Kconfig - ST Microelectronics STM32F103RB MCU
-#
-# Copyright (c) 2016 Open-RnD Sp. z o.o.
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-if SOC_STM32F103XB
-
-config SOC
-	string
-	default stm32f103xb
-
-config NUM_IRQS
-	int
-	default 59
-
-endif # SOC_STM32F103XB
-

arch/arm/soc/st_stm32/stm32f1/Kconfig.defconfig.stm32f103xe

@@ -1,19 +0,0 @@
-# Kconfig - ST Microelectronics STM32F103VE MCU
-#
-# Copyright (c) 2016 Open-RnD Sp. z o.o.
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-if SOC_STM32F103XE
-
-config SOC
-	string
-	default stm32f103xe
-
-config NUM_IRQS
-	int
-	default 68
-
-endif # SOC_STM32F103XE
-

arch/arm/soc/st_stm32/stm32f1/Kconfig.defconfig.stm32f103xx

@@ -0,0 +1,31 @@
+# Kconfig - ST Microelectronics STM32F103RB MCU
+#
+# Copyright (c) 2017, embedjournal.com
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+if SOC_STM32F103XB || SOC_STM32F103X8
+
+config SOC
+	string
+	default stm32f103xb
+
+config NUM_IRQS
+	int
+	default 59
+
+endif # SOC_STM32F103XB || SOC_STM32F103X8
+
+if SOC_STM32F103XE
+
+config SOC
+	string
+	default stm32f103xe
+
+config NUM_IRQS
+	int
+	default 68
+
+endif # SOC_STM32F103XE
+

arch/arm/soc/st_stm32/stm32f1/Kconfig.soc

@@ -18,6 +18,10 @@ config SOC_STM32F103XB
 	bool "STM32F103XB"
 	select SOC_STM32F10X_DENSITY_DEVICE
 
+config SOC_STM32F103X8
+	bool "STM32F103X8"
+	select SOC_STM32F10X_DENSITY_DEVICE
+
 config SOC_STM32F107XC
 	bool "STM32F107XC"
 	select SOC_STM32F10X_CONNECTIVITY_LINE_DEVICE