cpumask: remove references to struct irqaction's mask field.

Impact: cleanup

It's unused, since about 1995.  So remove all initialization of it in
preparation for actually removing the field.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

arch/sh/kernel/time_64.c

@@ -284,7 +284,6 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
 static struct irqaction irq0  = {
 	.handler = timer_interrupt,
 	.flags = IRQF_DISABLED,
-	.mask = CPU_MASK_NONE,
 	.name = "timer",
 };
 

arch/sh/kernel/timers/timer-cmt.c

@@ -109,7 +109,6 @@ static struct irqaction cmt_irq = {
 	.name		= "timer",
 	.handler	= cmt_timer_interrupt,
 	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
-	.mask		= CPU_MASK_NONE,
 };
 
 static void cmt_clk_init(struct clk *clk)

arch/sh/kernel/timers/timer-mtu2.c

@@ -115,7 +115,6 @@ static struct irqaction mtu2_irq = {
 	.name		= "timer",
 	.handler	= mtu2_timer_interrupt,
 	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
-	.mask		= CPU_MASK_NONE,
 };
 
 static unsigned int divisors[] = { 1, 4, 16, 64, 1, 1, 256 };

arch/sh/kernel/timers/timer-tmu.c

@@ -162,7 +162,6 @@ static struct irqaction tmu0_irq = {
 	.name		= "periodic/oneshot timer",
 	.handler	= tmu_timer_interrupt,
 	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
-	.mask		= CPU_MASK_NONE,
 };
 
 static void __init tmu_clk_init(struct clk *clk)