scripts/dtc: Update to upstream version v1.4.3

Using the update-dtc-source.sh script from Linux v4.14-rc1 import the
portions of dtc that we require.  We bring in update-dtc-source.sh and
scripts/dtc/Makefile from Linux v4.14-rc1.  Rework DTC_FLAGS handling to
not require a test.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/scripts/dtc/dtc-parser.tab.h_shipped b/scripts/dtc/dtc-parser.tab.h_shipped
new file mode 100644
index 0000000..e7b04dd
--- /dev/null
+++ b/scripts/dtc/dtc-parser.tab.h_shipped
@@ -0,0 +1,123 @@
+/* A Bison parser, made by GNU Bison 3.0.2.  */
+
+/* Bison interface for Yacc-like parsers in C
+
+   Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* As a special exception, you may create a larger work that contains
+   part or all of the Bison parser skeleton and distribute that work
+   under terms of your choice, so long as that work isn't itself a
+   parser generator using the skeleton or a modified version thereof
+   as a parser skeleton.  Alternatively, if you modify or redistribute
+   the parser skeleton itself, you may (at your option) remove this
+   special exception, which will cause the skeleton and the resulting
+   Bison output files to be licensed under the GNU General Public
+   License without this special exception.
+
+   This special exception was added by the Free Software Foundation in
+   version 2.2 of Bison.  */
+
+#ifndef YY_YY_DTC_PARSER_TAB_H_INCLUDED
+# define YY_YY_DTC_PARSER_TAB_H_INCLUDED
+/* Debug traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+#if YYDEBUG
+extern int yydebug;
+#endif
+
+/* Token type.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+  enum yytokentype
+  {
+    DT_V1 = 258,
+    DT_PLUGIN = 259,
+    DT_MEMRESERVE = 260,
+    DT_LSHIFT = 261,
+    DT_RSHIFT = 262,
+    DT_LE = 263,
+    DT_GE = 264,
+    DT_EQ = 265,
+    DT_NE = 266,
+    DT_AND = 267,
+    DT_OR = 268,
+    DT_BITS = 269,
+    DT_DEL_PROP = 270,
+    DT_DEL_NODE = 271,
+    DT_PROPNODENAME = 272,
+    DT_LITERAL = 273,
+    DT_CHAR_LITERAL = 274,
+    DT_BYTE = 275,
+    DT_STRING = 276,
+    DT_LABEL = 277,
+    DT_REF = 278,
+    DT_INCBIN = 279
+  };
+#endif
+
+/* Value type.  */
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+typedef union YYSTYPE YYSTYPE;
+union YYSTYPE
+{
+#line 39 "dtc-parser.y" /* yacc.c:1909  */
+
+	char *propnodename;
+	char *labelref;
+	uint8_t byte;
+	struct data data;
+
+	struct {
+		struct data	data;
+		int		bits;
+	} array;
+
+	struct property *prop;
+	struct property *proplist;
+	struct node *node;
+	struct node *nodelist;
+	struct reserve_info *re;
+	uint64_t integer;
+	unsigned int flags;
+
+#line 99 "dtc-parser.tab.h" /* yacc.c:1909  */
+};
+# define YYSTYPE_IS_TRIVIAL 1
+# define YYSTYPE_IS_DECLARED 1
+#endif
+
+/* Location type.  */
+#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
+typedef struct YYLTYPE YYLTYPE;
+struct YYLTYPE
+{
+  int first_line;
+  int first_column;
+  int last_line;
+  int last_column;
+};
+# define YYLTYPE_IS_DECLARED 1
+# define YYLTYPE_IS_TRIVIAL 1
+#endif
+
+
+extern YYSTYPE yylval;
+extern YYLTYPE yylloc;
+int yyparse (void);
+
+#endif /* !YY_YY_DTC_PARSER_TAB_H_INCLUDED  */