allow specifying literal values in MODULE_PNP_INFO(9)

[Yuri Pankov]

Warner Losh wrote:
> On Tue, Sep 25, 2018 at 7:12 AM Yuri Pankov <yuripv at yuripv.net> wrote:
> 
>> Hi,
>>
>> Looking at adding the MODULE_PNP_INFO() entry to iwm(4), I came up with
>> the patch in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231625
>> adding redundant and useless vendor field to iwm_devices.  While it
>> works, it's unfortunate, and I have started looking into possible
>> solutions and the result is a small patch for kldxref(8) allowing
>> specifying literal values in descriptor_string like the following:
>>
>> MODULE_PNP_INFO("U16=8086:vendor;U16:device;P:#", pci, iwm_pci_driver,
>>       iwm_devices, sizeof(iwm_devices[0]), nitems(iwm_devices));
>>
>> ...so that we always have vendor 0x8086 and only consume the device field.
>>
>> If it makes at least some sense, I'll put it for review.
>>
> 
> So what's wrong with using the T type that's already implemented?
> T:device=0x8086?

Nothing other than my inability to read and understand the 
documentation.  I'm actually happy that it already exists.  Thanks and 
sorry for the noise.