On some laptops, keyboard needs to be reset in order to successfully detect
touchpad (e.g., some Gigabyte laptop models with Elantech touchpads).
Without resettin keyboard touchpad pretends to be completely dead.

Based on the original patch by Mateusz Jończyk this version has been
expanded to include DMI based detection & application of the fix
automatically on the affected models of laptops. This has been confirmed to
fix problem by three users already on three different models of laptops.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=81331
Cc: stable@vger.kernel.org
Signed-off-by: NSrihari Vijayaraghavan <linux.bug.reporting@gmail.com>
Acked-by: NMateusz Jończyk <mat.jonczyk@o2.pl>
Tested-by: NSrihari Vijayaraghavan <linux.bug.reporting@gmail.com>
Tested by: Zakariya Dehlawi <zdehlawi@gmail.com>
Tested-by: NGuillaum Bouchard <guillaum.bouchard@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>