atkbc: Better test for old chromebooks

[imp]

Summary

Implement a test recommended by MrChromebox <[e-mail]>: If
the bios.version starts with Google_, or the maker is either Google or
GOOGLE, assume that it's a chromebook with the affected bios. While this
isn't strictly true, the number of updated systems without the bug is
very small and this will exclude all the modern coreboot uses. There's
no simple way to test the hardware.

Sponsored by: Netflix

[jon_thesoo.org]

This is cleaner.

[rpokala]

D40787 applied the quirks for {"coreboot", "Acer", "Peppy"}, but this change does not...?

Also, please properly quote the match strings in the description / commit message.

[jrtc27]

sys/dev/atkbdc/atkbdc.c

139

This is a bit of a behaviour change; now it's prefix matching everything, whereas you really only want this for Google_

[imp]

update comments
and go ahead and implement two different marcos, one
to match the first part, and one for equality. Likely
not going to make a difference in practice, but now the code matches
the comments.

[imp]

sys/dev/atkbdc/atkbdc.c

139

Yea, I debated what to do. Prefix matching won't change what we match today.
But it's likely better to separate the two concepts.