[PATCH] export pfn_to_nid to modules

Patch from Patricia Gaughen <gone@us.ibm.com>

This function was recently uninlined for NUMAQ.  But it used to be a macro,
and modules need it.

arch/i386/kernel/i386_ksyms.c

@@ -68,6 +68,9 @@ EXPORT_SYMBOL(EISA_bus);
 EXPORT_SYMBOL(MCA_bus);
 #ifdef CONFIG_DISCONTIGMEM
 EXPORT_SYMBOL(node_data);
+#ifdef CONFIG_X86_NUMAQ
+EXPORT_SYMBOL(pfn_to_nid);
+#endif
 #endif
 #ifdef CONFIG_X86_NUMAQ
 EXPORT_SYMBOL(xquad_portio);