powerpc/wsp: Add MSI support for PCI on PowerEN

Based on a patch by Michael Ellerman <michael@ellerman.id.au>

Patch was simply forward ported upstream.

Jimi Xenidis <jimix@pobox.com>

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/wsp/msi.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2011 Michael Ellerman, IBM Corp.
+ *
+ *  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 of the License, or (at your option) any later version.
+ */
+
+#ifndef __WSP_MSI_H
+#define __WSP_MSI_H
+
+#ifdef CONFIG_PCI_MSI
+extern void wsp_setup_phb_msi(struct pci_controller *phb);
+#else
+static inline void wsp_setup_phb_msi(struct pci_controller *phb) { }
+#endif
+
+#endif /* __WSP_MSI_H */