net/smc: ignore loopback-ism when dumping SMC-D devices

net/smc: ignore loopback-ism when dumping SMC-D devices

Since loopback-ism is not a PCI device, the PCI information fed back by
smc_nl_handle_smcd_dev() does not apply to loopback-ism. So currently
ignore loopback-ism when dumping SMC-D devices. The netlink function of
loopback-ism will be refactored when SMC netlink interface is updated.

Link: https://lore.kernel.org/r/caab067b-f5c3-490f-9259-262624c236b4@linux.ibm.com/
Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-and-tested-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>