[romprefix] Ensure UNDI loader can be included by all ROM types

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/config/config_isaromprefix.c

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+/*
+ * 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 2, or (at
+ * your option) any later version.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include "config_romprefix.c"

src/config/config_mromprefix.c

@@ -0,0 +1,10 @@
+/*
+ * 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 2, or (at
+ * your option) any later version.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include "config_romprefix.c"

src/config/config_pciromprefix.c

@@ -0,0 +1,10 @@
+/*
+ * 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 2, or (at
+ * your option) any later version.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include "config_romprefix.c"