ARM: riscpc: fix lack of keyboard interrupts after irq conversion

Fix lack of keyboard interrupts for RiscPC due to incorrect conversion.

Fixes: e8d36d5dbb ("ARM: kill off set_irq_flags usage")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

arch/arm/mach-rpc/irq.c

@@ -118,7 +118,7 @@ extern unsigned char rpc_default_fiq_start, rpc_default_fiq_end;
 
 void __init rpc_init_irq(void)
 {
-	unsigned int irq, clr, set = 0;
+	unsigned int irq, clr, set;
 
 	iomd_writeb(0, IOMD_IRQMASKA);
 	iomd_writeb(0, IOMD_IRQMASKB);
@@ -130,6 +130,7 @@ void __init rpc_init_irq(void)
 
 	for (irq = 0; irq < NR_IRQS; irq++) {
 		clr = IRQ_NOREQUEST;
+		set = 0;
 
 		if (irq <= 6 || (irq >= 9 && irq <= 15))
 			clr |= IRQ_NOPROBE;