irqchip: bcm2835: Avoid arch/arm-specific handle_IRQ

With commit

76ba59f8366f genirq: Add irq_domain-aware core IRQ handler

architecture-specific irq handlers are no longer necessary. Update the bcm2835
irq driver to use the core irq handler. As a bonus, this allows the driver to
support arm64 as well.

Signed-off-by: Eric Anholt <[e-mail]>
Acked-by: Stephen Warren <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]
[jac reworded commit message for clarity]
Signed-off-by: Jason Cooper <[e-mail]>

drivers/irqchip/irq-bcm2835.c

···
 #include <linux/irqdomain.h>
 
 #include <asm/exception.h>
-#include <asm/mach/irq.h>
 
 /* Put the bank and irq (32 bits) into the hwirq */
 #define MAKE_HWIRQ(b, n)	((b << 5) | (n))
···
 	u32 hwirq;
 
 	while ((hwirq = get_next_armctrl_hwirq()) != ~0)
-		handle_IRQ(irq_linear_revmap(intc.domain, hwirq), regs);
+		handle_domain_irq(intc.domain, hwirq, regs);
 }
 
 static void bcm2836_chained_handle_irq(struct irq_desc *desc)

drivers/irqchip/irq-bcm2836.c

···
 	} else if (stat) {
 		u32 hwirq = ffs(stat) - 1;
 
-		handle_IRQ(irq_linear_revmap(intc.domain, hwirq), regs);
+		handle_domain_irq(intc.domain, hwirq, regs);
 	}
 }