drivers: charger: charger_max20335: introduce int utilization

Utilization of chip interrupt line is mandatory to assure proper
charger state control. Handle interrupt to prepare the driver for
implementation of such functionality.
Modify charger status update so the current state is fetched in the
interrupt handler.

Use level based interrupts combined with interrupt disabling for a
period of time after interrupt handling to reduce number of interrupts
triggered by the charger. There may be a case where the charger
produces burst of interrupts for a several seconds and if the code
attempts to handle every single interrupt separatery then the system
might be significantly overloaded.

Co-authored-by: Bartosz Bilas <b.bilas@grinn-global.com>
Signed-off-by: Lukasz Madej <l.madej@grinn-global.com>