mfd: tqmx86: Add I2C IRQ support

mfd: tqmx86: Add I2C IRQ support

The i2c-ocores controller can run in interrupt mode on tqmx86 modules.
Add a module parameter to allow configuring the IRQ number, similar to the
handling of the GPIO IRQ.

The new code and module parameter refer to the I2C controller as "I2C1",
as the TQMx86 PLD actually contains a second I2C controller, for which
driver support will be added in the future.

Signed-off-by: Gregor Herburger <gregor.herburger@tq-group.com>
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/c1b0769e00a8a4e463cffe725e939b0e5c2992c8.1731325758.git.matthias.schiffer@ew.tq-group.com
Signed-off-by: Lee Jones <lee@kernel.org>