zephyr: restructure the build process to use board config files

Move the board specific configurations into its own header file, which
can now be created per board, once it gets tested and validated by the
bootloader.

Signed-off-by: Ricardo Salveti <ricardo.salveti@linaro.org>
diff --git a/boot/zephyr/targets/96b_carbon.h b/boot/zephyr/targets/96b_carbon.h
new file mode 100644
index 0000000..6d8b248
--- /dev/null
+++ b/boot/zephyr/targets/96b_carbon.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2017 Linaro
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file
+ * @brief Bootloader device specific configuration.
+ */
+
+#define FLASH_DRIVER_NAME		"STM32F4_FLASH"
+#define FLASH_ALIGN			1
+#define FLASH_AREA_IMAGE_0_OFFSET	0x20000
+#define FLASH_AREA_IMAGE_0_SIZE		0x20000
+#define FLASH_AREA_IMAGE_1_OFFSET	0x40000
+#define FLASH_AREA_IMAGE_1_SIZE		0x20000
+#define FLASH_AREA_IMAGE_SCRATCH_OFFSET	0x60000
+#define FLASH_AREA_IMAGE_SCRATCH_SIZE	0x20000