rtc: isl12022: Fix initial enable_irq/disable_irq balance

Interrupts are automatically enabled when requested, so we need to
initialize irq_enabled accordingly to avoid causing an unbalanced enable
warning.

Fixes: c62d658 ("rtc: isl12022: Add alarm support")
Signed-off-by: Esben Haabendal <esben@geanix.com>
Link: https://lore.kernel.org/r/20250516-rtc-uie-irq-fixes-v2-2-3de8e530a39e@geanix.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: esben

drivers/rtc/rtc-isl12022.c

@@ -413,6 +413,7 @@ static int isl12022_setup_irq(struct device *dev, int irq)
 	if (ret)
 		return ret;
 
+	isl12022->irq_enabled = true;
 	ret = devm_request_threaded_irq(dev, irq, NULL,
 					isl12022_rtc_interrupt,
 					IRQF_SHARED | IRQF_ONESHOT,