powerpc: move iSeries/iSeries_pci.h to platforms/iseries

The only real user of this file outside platforms/iseries was
drivers/net/iseries_veth.c but all it wanted was ISERIES_HV_ADDR()
so we move that to abs_addr.h (and lowercase it).

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
index f80ec8d..9d91bdd 100644
--- a/include/asm-powerpc/iommu.h
+++ b/include/asm-powerpc/iommu.h
@@ -21,6 +21,7 @@
 #ifndef _ASM_IOMMU_H
 #define _ASM_IOMMU_H
 
+#include <linux/config.h>
 #include <asm/types.h>
 #include <linux/spinlock.h>
 #include <linux/device.h>