irq: remove CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY

Now that all users of CONFIG_HANDLE_DOMAIN_IRQ perform the irq entry
work themselves, we can remove the legacy
CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY behaviour.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/irqdesc.c

@@ -676,31 +676,6 @@ int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwirq)
 EXPORT_SYMBOL_GPL(generic_handle_domain_irq);
 
 #ifdef CONFIG_HANDLE_DOMAIN_IRQ
-#ifdef CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
-/**
- * handle_domain_irq - Invoke the handler for a HW irq belonging to a domain,
- *                     usually for a root interrupt controller
- * @domain:	The domain where to perform the lookup
- * @hwirq:	The HW irq number to convert to a logical one
- * @regs:	Register file coming from the low-level handling code
- *
- * Returns:	0 on success, or -EINVAL if conversion has failed
- */
-int handle_domain_irq(struct irq_domain *domain,
-		      unsigned int hwirq, struct pt_regs *regs)
-{
-	struct pt_regs *old_regs = set_irq_regs(regs);
-	int ret;
-
-	irq_enter();
-
-	ret = generic_handle_domain_irq(domain, hwirq);
-
-	irq_exit();
-	set_irq_regs(old_regs);
-	return ret;
-}
-#else
 /**
  * handle_domain_irq - Invoke the handler for a HW irq belonging to a domain,
  *                     usually for a root interrupt controller
@@ -728,7 +703,6 @@ int handle_domain_irq(struct irq_domain *domain,
 	set_irq_regs(old_regs);
 	return ret;
 }
-#endif
 
 /**
  * handle_domain_nmi - Invoke the handler for a HW irq belonging to a domain