run: support target serial for base-nova

Issue #683
device_pd: survive failing attachment request

Be more robust. If the attachment fails continue to operate and just print a
error message. Before the commit the device_pd stopped to operate if an
attachment did not succeed.

Issue #683
usb: fix usb stack when used with IOMMU

Fixes #683
acpi: parse RMRR structures and print DMA regions

The regions reported by the RMRR structure are used by legacy devices for DMA
requests. Theses would need to be added to the device_pd to avoid DMAR faults
when used in legacy mode.

For now parse and print them, so that one has a clue about why we get DMAR
faults.

Issue #683