[PATCH] pci: call pci_read_irq for bridges

Call pci_read_irq() for bridges too, so that the pin value
is stored for bridges that require interrupts.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>