platform/x86: touchscreen_dmi: Add info for the ezpad 6 m4 tablet

Add touchscreen info for the Jumper EZpad 6 m4 tablet.

Reported-and-tested-by: youling257 <youling257@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>