mfd: max77759: add register bitmasks and modify irq configs for charger

mfd: max77759: add register bitmasks and modify irq configs for charger

Add register bitmasks for charger function.
In addition split the charger IRQs further such that each bit represents
an IRQ downstream of charger regmap irq chip. In addition populate the
ack_base to offload irq ack to the regmap irq chip framework.

Signed-off-by: Amit Sunil Dhamne <amitsd@google.com>
Reviewed-by: André Draszik <andre.draszik@linaro.org>
Link: https://patch.msgid.link/20260325-max77759-charger-v9-3-4486dd297adc@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>