mfd: kempld: Add support for COMe-mBT10, COMe-cBT6 and COMe-cHL6 to Kontron PLD driver

mfd: kempld: Add support for COMe-mBT10, COMe-cBT6 and COMe-cHL6 to Kontron PLD driver

This patch adds DMI system IDs for the Kontron modules COMe-mBT10, COMe-cBT6
and COMe-cHL6 to the Kontron PLD driver. The list of supported products in
the module description is also updated.

Signed-off-by: Michael Brunner <michael.brunner@kontron.com>
Acked-by: Christian Rauch <christian.rauch@kontron.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>