platform/x86: x86-android-tablets: Lenovo Yoga Book match is for YB1-X91 models only

When support for instantiating an i2c-client for the fuel-gauge was
added for the Windows based Yoga Book YB1-X91F/L models, the assumption
was made that this would apply to the Android based YB1-X90F/L models too.

But these have a completely different BIOS with completely different DMI
strings. Update the existing YB1-X91 support to reflect that it only
applies to the YB1-X91F/L models.

Cc: Yauhen Kharuzhy <jekhor@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20230301092331.7038-15-hdegoede@redhat.com