x86: make 32bit MAX_HARDIRQS_PER_CPU to be NR_VECTORS

Impact: clean up to be same as 64bit

32-bit is using per-cpu vector too, so don't use default NR_IRQS.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/include/asm/hardirq_32.h

@@ -19,6 +19,9 @@ typedef struct {
 
 DECLARE_PER_CPU(irq_cpustat_t, irq_stat);
 
+/* We can have at most NR_VECTORS irqs routed to a cpu at a time */
+#define MAX_HARDIRQS_PER_CPU NR_VECTORS
+
 #define __ARCH_IRQ_STAT
 #define __IRQ_STAT(cpu, member) (per_cpu(irq_stat, cpu).member)