powerpc/pci: remove duplicate declaration of pci_bus_find_capability
powerpc/pci: remove duplicate declaration of pci_bus_find_capability

pci_bus_find_capability() is decleared in pci.h, so it is not necessary to do
it again.

This patch removes it.

Signed-off-by: Wei Yang <acbca9fda1bd78fcd284ddae8b872fb12de49b82@linux.vnet.ibm.com>
Reviewed-by: Gavin Shan <0398910e4f4970259b451f0f9d0686cc5e961b81@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <864f124608374e06e4da1fa5d2e47ed839b95411@ellerman.id.au>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs