pci: initialize generic driver pointer
pci: initialize generic driver pointer

The existing code initializes a PCI driver pointer but not the common one.
As the result, ring_dma_zone_reserve() in drivers/net/bnx2x/bnx2x_rxtx.c
crashed as dev->device->driver==NULL.

This adds missing initialization.

Signed-off-by: Alexey Kardashevskiy <ac1fc56530d7d037e1ea666f130daca22d72f964@ozlabs.ru>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk