mfd: tps6594-core: Add TI TPS65224 PMIC core

Add functionality of the TPS65224 PMIC to the TPS6594 core driver. This
includes adding IRQ resource, MFD cells, and device initialization for
TPS65224.

Signed-off-by: Bhargav Raviprakash <bhargav.r@ltts.com>
Acked-by: Julien Panis <jpanis@baylibre.com>
Link: https://lore.kernel.org/r/0109018f2fdc7df4-b986892b-9dac-4af2-90f5-57fd67ed154d-000000@ap-south-1.amazonses.com
Signed-off-by: Lee Jones <lee@kernel.org>