powercap: idle_inject: Simplify if condition

The if condition !A || A && B can be simplified to !A || B.

Fixes the following Coccinelle/coccicheck warning reported by
excluded_middle.cocci:

	WARNING !A || A && B is equivalent to !A || B

Compile-tested only.
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/powercap/idle_inject.c

@@ -127,7 +127,7 @@ static enum hrtimer_restart idle_inject_timer_fn(struct hrtimer *timer)
 	struct idle_inject_device *ii_dev =
 		container_of(timer, struct idle_inject_device, timer);
 
-	if (!ii_dev->update || (ii_dev->update && ii_dev->update()))
+	if (!ii_dev->update || ii_dev->update())
 		idle_inject_wakeup(ii_dev);
 
 	duration_us = READ_ONCE(ii_dev->run_duration_us);