Remove const from dtc_file::dir.

Signed-off-by: Scott Wood <scottwood@freescale.com>

srcpos.c

@@ -104,7 +104,7 @@ struct dtc_file *dtc_open_file(const char *fname,
 	}
 
 out:
-	free((void *)file->dir);
+	free(file->dir);
 	free(file);
 	return NULL;
 }
@@ -114,6 +114,6 @@ void dtc_close_file(struct dtc_file *file)
 	if (fclose(file->file))
 		die("Error closing \"%s\": %s\n", file->name, strerror(errno));
 
-	free((void *)file->dir);
+	free(file->dir);
 	free(file);
 }

srcpos.h

@@ -25,7 +25,7 @@
 #include <stdio.h>
 
 struct dtc_file {
-	const char *dir;
+	char *dir;
 	const char *name;
 	FILE *file;
 };