powerpc/powernv: Add a print indicating when an IODA PE is released

Quite useful to know in some cases.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200408112213.5549-1-oohall@gmail.com

arch/powerpc/platforms/powernv/pci-ioda.c

@@ -3465,6 +3465,8 @@ static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe)
 	struct pnv_phb *phb = pe->phb;
 	struct pnv_ioda_pe *slave, *tmp;
 
+	pe_info(pe, "Releasing PE\n");
+
 	mutex_lock(&phb->ioda.pe_list_mutex);
 	list_del(&pe->list);
 	mutex_unlock(&phb->ioda.pe_list_mutex);