fujitsu-tablet: correct quirks for Lifebook and Stylistic tablets

This patch adds a quirk to fix the dock detection for Fujitsu Stylistic
devices and fixes an bug in which tablet mode state was not correctly
reported in Fujitsu Lifebook and Stylistic models.

Signed-off-by: Robert Gerlach <khnz@gmx.de>
Signed-off-by: Matthew Garrett <mjg@redhat.com>