[POWERPC] arch/ppc: Remove an unnecessary pci_dev_put

Remove an unnecessary pci_dev_put.  pci_dev_put is called implicitly
by the subsequent call to pci_get_device.

The problem was detected using the following semantic patch, and
corrected by hand.

@@
expression dev;
expression E;
@@

- pci_dev_put(dev)
   ... when != dev = E
- pci_get_device(...,dev)
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/ppc/platforms/prep_pci.c

@@ -1099,7 +1099,6 @@ prep_pib_init(void)
 				pci_write_config_byte(dev, 0x43, reg);
 			}
 		}
-		pci_dev_put(dev);
 	}
 
 	if ((dev = pci_get_device(PCI_VENDOR_ID_WINBOND,