thermal/drivers/qcom/lmh: Fix irq handler return value

After enough invocations the LMh irq is eventually reported as bad, because the
handler doesn't return IRQ_HANDLED, fix this.

Fixes: 53bca371cd ("thermal/drivers/qcom: Add support for LMh driver")
Reported-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220316180322.88132-1-bjorn.andersson@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>

drivers/thermal/qcom/lmh.c

@@ -45,7 +45,7 @@ static irqreturn_t lmh_handle_irq(int hw_irq, void *data)
 	if (irq)
 		generic_handle_irq(irq);
 
-	return 0;
+	return IRQ_HANDLED;
 }
 
 static void lmh_enable_interrupt(struct irq_data *d)