sparc64: Fix missing devices due to PCI bridge test in of_create_pci_dev().

[ Upstream commit 44b50e5a ]

Just like in the arch/sparc64/kernel/of_device.c code fix commit
071d7f4c3b411beae08d27656e958070c43b78b4 ("sparc64: Fix disappearing
PCI devices on e3500.") we have to check the OF device node name for
"pci" instead of relying upon the 'device_type' property being there
on all PCI bridges.

Tested by Meelis Roos, and confirmed to make the PCI QFE devices
reappear on the E3500 system.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>