kconfig: use distinct tokens for type and default properties

This commit removes kconf_id::stype to prepare for the entire
removal of kconf_id.c

To simplify the lexer, I want keywords straight-mapped to tokens.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

scripts/kconfig/lkc.h

@@ -50,7 +50,6 @@ struct kconf_id {
 	const char *name;
 	int token;
 	unsigned int flags;
-	enum symbol_type stype;
 };
 
 extern int yylineno;