Use pmap_qenter in the N1SDP PCIe driver

[andrew]

Summary

In the Neoverse N1 SDP PCIe driver we need to map a page shared
between the firmware and the kernel. Previously we would use
pmap_kenter for this, however as this is not standardised between
architectures switch to the common pmap_qenter.

While here fix the error handling code to clean up on failure.

[br]

Booted fine. All my PCI cards work fine.

sys/dev/pci/controller/pci_n1sdp.c

124

No need to wrap. There is enough space on previous line for this.