The diff below makes the dwiic(4) driver's match function behave like
the other acpi attach functions by matching on the _HID. This way it
will continue to atach with the diff I sent out earlier today.
I deliberately did not use the #define's from acpireg.h here. I
intend to remove those. Just listing the strings in the driver makes
it easier to check to what IDs the driver attaches.