We added coulomb counter calibration support With commit 0cb90f07
("power: supply: cpcap-battery: Add basic coulomb counter calibrate
support"), but we also need to configure the related interrupt.

Without the interrupt calibration happens based on a timeout after two
seconds, with the interrupt the calibration just gets done a bit faster.

Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>