powerpc: Use pr_warn instead of pr_warning

At some point, pr_warning will be removed so all logging messages use
a consistent <prefix>_warn style.

Update arch/powerpc/

Miscellanea:

o Coalesce formats
o Realign arguments
o Use %s, __func__ instead of embedded function names
o Remove unnecessary line continuations

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Geoff Levand <geoff@infradead.org>
[mpe: Rebase due to some %pOF changes.]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/pci-common.c

@@ -1276,8 +1276,8 @@ static void pcibios_allocate_bus_resources(struct pci_bus *bus)
 						i + PCI_BRIDGE_RESOURCES) == 0)
 				continue;
 		}
-		pr_warning("PCI: Cannot allocate resource region "
-			   "%d of PCI bridge %d, will remap\n", i, bus->number);
+		pr_warn("PCI: Cannot allocate resource region %d of PCI bridge %d, will remap\n",
+			i, bus->number);
 	clear_resource:
 		/* The resource might be figured out when doing
 		 * reassignment based on the resources required