universal7885: Add samsung dtb header

* https://github.com/LineageOS/android_device_samsung_star-common/blob/lineage-15.1/include/samsung_dtbh.h

BoardConfigCommon.mk

@@ -45,6 +45,9 @@ TARGET_USES_64_BIT_BINDER := true
 TARGET_USERIMAGES_USE_EXT4 := true
 TARGET_USES_MKE2FS := true
 
+# Include
+TARGET_SPECIFIC_HEADER_PATH := $(COMMON_PATH)/include
+
 # Kernel
 BOARD_CUSTOM_BOOTIMG_MK := hardware/samsung/mkbootimg.mk
 BOARD_KERNEL_IMAGE_NAME := Image

include/samsung_dtbh.h

@@ -0,0 +1,37 @@
+/* tools/mkbootimg/samsung_dtbh.h
+**
+** Copyright 2017, The LineageOS Project
+**
+** 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.
+*/
+
+#ifndef _SAMSUNG_DTBH_H_
+#define _SAMSUNG_DTBH_H_
+
+#define DTBH_MAGIC         "DTBH"
+#define DTBH_VERSION       2
+#define DTBH_PLATFORM      "android"
+#define DTBH_SUBTYPE       "samsung"
+ /* Hardcoded entry */
+#define DTBH_PLATFORM_CODE 0x000050a6
+#define DTBH_SUBTYPE_CODE  0x217584da
+
+/* DTBH_MAGIC + DTBH_VERSION + DTB counts */
+#define DT_HEADER_PHYS_SIZE 12
+
+/*
+ * keep the eight uint32_t entries first in this struct so we can memcpy them to the file
+ */
+#define DT_ENTRY_PHYS_SIZE (sizeof(uint32_t) * 8)
+
+#endif // _SAMSUNG_DTBH_H_