softirq: Remove __ARCH_SET_SOFTIRQ_PENDING

The last user of __ARCH_SET_SOFTIRQ_PENDING has been converted to generic
per-cpu softirq mask. We can now remove this conditional.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 359c252..da5dcf0 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -446,10 +446,8 @@
 
 #else /* local_softirq_pending */
 
-#ifndef __ARCH_SET_SOFTIRQ_PENDING
 #define set_softirq_pending(x) (local_softirq_pending() = (x))
 #define or_softirq_pending(x)  (local_softirq_pending() |= (x))
-#endif
 
 #endif /* local_softirq_pending */