ab8500_fg: Balance IRQ enable

In case of time out error IRQ needs to be disabled
otherwise we will get unbalanced enable/disable pairs.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Rickard Andersson <rickard.andersson@stericsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>

drivers/power/ab8500_fg.c

@@ -745,6 +745,7 @@ int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di)
 	dev_dbg(di->dev, "%s instant current: %d", __func__, res);
 	return res;
 fail:
+	disable_irq(di->irq);
 	mutex_unlock(&di->cc_lock);
 	return ret;
 }