Fix a build error when using bison-2.4

This fixes one of the errors from using bison-2.4, but there are more.

This one in details is the following error:

  BISON   build/util/dtc/dtc-parser.tab.c
  HOSTCC  build/util/dtc/dtc-parser.tab.o
/home/leio/dev/coreboot-v3/util/dtc/dtc-parser.y: In function ‘yyuserAction’:
/home/leio/dev/coreboot-v3/util/dtc/dtc-parser.y:154: error: expected ‘;’ before ‘}’ token
make: *** [/home/leio/dev/coreboot-v3/build/util/dtc/dtc-parser.tab.o] Error 1

Note that 2.4.1 might be made to still work without the semi-colon for some languages, but I
understand 2.5 then still won't work without one. As it builds fine with this change with
bison-2.3, it should be safe to just add the semicolon.

The remaining error is the following:

/home/leio/dev/coreboot-v3/util/dtc/dtc-lexer.l: In function ‘yylex’:
/home/leio/dev/coreboot-v3/util/dtc/dtc-lexer.l:73: error: ‘yylval’ undeclared (first use in this function)
/home/leio/dev/coreboot-v3/util/dtc/dtc-lexer.l:73: error: (Each undeclared identifier is reported only once
/home/leio/dev/coreboot-v3/util/dtc/dtc-lexer.l:73: error: for each function it appears in.)

dtc-parser.tab.h doesn't seem to get an "extern YYSTYPE yylval" declaration, which per documentation should
only happen for pure parser cases ("%define api.pure"), but I can't find any such declaration in dtc to cause
the problem.

Note that upstream dtc builds fine with bison-2.4

Signed-off-by: Mart Raudsepp <mart.raudsepp@artecdesign.ee>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

git-svn-id: svn://coreboot.org/repository/coreboot-v3@1004 f3766cd6-281f-0410-b1cd-43a5c92072e9

util/dtc/dtc-parser.y

@@ -150,7 +150,7 @@ config:        DT_CONFIG '('
 				if ((namelen > 4) && (! strncmp(&name[namelen-4], ".dts", 4)))
 					$6->label[namelen-4] = '\0';
 
-				$$ = $6
+				$$ = $6;
 			}
 	|
 	;