nixos/libinput: apply options to all device types

Instead of assign the libinput options to touchpad devices only, it
should be appied by any device using libinput.
Due to the fact that `40-libinput.conf` already defines libinput as
driver for any detected input device, we can use `MatchDriver` to appy
options.

(cherry picked from commit d616928)

nixos/modules/services/x11/hardware/libinput.nix

@@ -209,12 +209,12 @@ in {
 
     services.xserver.config =
       ''
-        # Automatically enable the libinput driver for all touchpads.
+        # General libinput configuration.
+        # See CONFIGURATION DETAILS section of man:libinput(4).
         Section "InputClass"
           Identifier "libinputConfiguration"
-          MatchIsTouchpad "on"
+          MatchDriver "libinput"
           ${optionalString (cfg.dev != null) ''MatchDevicePath "${cfg.dev}"''}
-          Driver "libinput"
           Option "AccelProfile" "${cfg.accelProfile}"
           ${optionalString (cfg.accelSpeed != null) ''Option "AccelSpeed" "${cfg.accelSpeed}"''}
           ${optionalString (cfg.buttonMapping != null) ''Option "ButtonMapping" "${cfg.buttonMapping}"''}