ARM: shmobile: Drop dev_irq_safe from r8a7779 genpd config

The dev_irq_safe configuration is redundant, genpd don't have any
special treatmeant for handling it. Let's remove it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

arch/arm/mach-shmobile/pm-r8a7779.c

@@ -87,7 +87,6 @@ static void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
 	genpd->dev_ops.stop = pm_clk_suspend;
 	genpd->dev_ops.start = pm_clk_resume;
 	genpd->dev_ops.active_wakeup = pd_active_wakeup;
-	genpd->dev_irq_safe = true;
 	genpd->power_off = pd_power_down;
 	genpd->power_on = pd_power_up;