powerpc/wsp: Add PCIe Root support to PowerEN/WSP

Based on a patch by Benjamin Herrenschmidt <benh@kernel.crashing.org>

Modernized and slightly modified to not record erros into the nvram
log since we do not have that device driver just yet.

Jimi Xenidis <jimix@pobox.com>

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/wsp/wsp.h b/arch/powerpc/platforms/wsp/wsp.h
index 7c3e087..3347981 100644
--- a/arch/powerpc/platforms/wsp/wsp.h
+++ b/arch/powerpc/platforms/wsp/wsp.h
@@ -3,6 +3,9 @@
 
 #include <asm/wsp.h>
 
+/* Devtree compatible strings for major devices */
+#define PCIE_COMPATIBLE     "ibm,wsp-pciex"
+
 extern void wsp_setup_pci(void);
 extern void scom_init_wsp(void);