jhb f51b2a4393 Add locking to the adw(4) driver and mark it MPSAFE.
- Use device_printf() and device_get_nameunit() instead of adw_name().
- Remove use of explicit bus space handles and tags.
- Use pci_enable_busmaster() rather than frobbing the PCI command register
  directly.
- Use the softc provided by new-bus rather than allocating a new one.

Tested by:	no one
2012-10-15 15:26:00 +00:00
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