PM: domains: Simplify the calculation of variables

Fix the following coccicheck warnings:

./drivers/base/power/domain.c:938:31-33: WARNING !A || A && B is
equivalent to !A || B.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Suggested-by: Jiapeng Zhong <oswb@linux.alibaba.com>
Signed-off-by: Abaci Team <abaci-bugfix@linux.alibaba.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/power/domain.c

@@ -966,8 +966,7 @@ static int genpd_runtime_resume(struct device *dev)
 err_stop:
 	genpd_stop_dev(genpd, dev);
 err_poweroff:
-	if (!pm_runtime_is_irq_safe(dev) ||
-		(pm_runtime_is_irq_safe(dev) && genpd_is_irq_safe(genpd))) {
+	if (!pm_runtime_is_irq_safe(dev) || genpd_is_irq_safe(genpd)) {
 		genpd_lock(genpd);
 		genpd_power_off(genpd, true, 0);
 		genpd_unlock(genpd);