linux-phytec-ti

regmap: store irq_chip inside regmap_irq_chip_data

This will allow later patches to adjust portions of the irq_chip
individually for each regmap_irq_chip that is created.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>