platform/x86: touchscreen_dmi.c: small changes for Archos 101 Cesium Educ tablet

Fix the axes and add home button support as suggested by Hans de Goede.

Signed-off-by: Thomas GENTY <tomlohave@gmail.com>
Link: https://lore.kernel.org/r/20230714105117.192938-1-tomlohave@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>