powerpc/powernv: Drop PHB operation next_error()

The patch drops PHB EEH operation next_error() and merges its
logic to eeh_ops::next_error().
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/powernv/pci.h

@@ -79,7 +79,6 @@ struct pnv_ioda_pe {
 #ifdef CONFIG_EEH
 struct pnv_eeh_ops {
 	int (*reset)(struct eeh_pe *pe, int option);
-	int (*next_error)(struct eeh_pe **pe);
 };
 #endif /* CONFIG_EEH */