[SOFTIRQ]: Remove do_softirq() symbol export.

As noted by Christoph Hellwig, pktgen was the only user so
it can now be removed.

[ Add missing cases caught by Adrian Bunk. -DaveM ]
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/i386/kernel/irq.c

@@ -231,8 +231,6 @@ asmlinkage void do_softirq(void)
 
 	local_irq_restore(flags);
 }
-
-EXPORT_SYMBOL(do_softirq);
 #endif
 
 /*

arch/powerpc/kernel/irq.c

@@ -395,7 +395,6 @@ void do_softirq(void)
 
 	local_irq_restore(flags);
 }
-EXPORT_SYMBOL(do_softirq);
 
 
 /*

arch/s390/kernel/irq.c

@@ -95,7 +95,6 @@ asmlinkage void do_softirq(void)
 
 	local_irq_restore(flags);
 }
-EXPORT_SYMBOL(do_softirq);
 
 void init_irq_proc(void)
 {

arch/sh/kernel/irq.c

@@ -245,7 +245,6 @@ asmlinkage void do_softirq(void)
 
 	local_irq_restore(flags);
 }
-EXPORT_SYMBOL(do_softirq);
 #endif
 
 void __init init_IRQ(void)

arch/x86_64/kernel/irq.c

@@ -210,4 +210,3 @@ asmlinkage void do_softirq(void)
 	}
  	local_irq_restore(flags);
 }
-EXPORT_SYMBOL(do_softirq);

kernel/softirq.c

@@ -271,8 +271,6 @@ asmlinkage void do_softirq(void)
 	local_irq_restore(flags);
 }
 
-EXPORT_SYMBOL(do_softirq);
-
 #endif
 
 /*