- Remove unneeded machine/ipl.h #include.

- Change the softintr() macro to do nothing on FreeBSD.  Previously,
  this macro would set a bit in spending and schedule the softinterrupt
  thread to run.  However, the bs driver never actually registers a
  a software interrupt handler, so all this work achieved nothing.  From
  the code it is not clear what exactly the softintr() macro is actually
  supposed to be doing.  It looks like it is supposed to be possibly
  running the hardware interrupt handler maybe?  This handler is only
  present in the #ifdef __NetBSD__ code however.  I have no idea how this
  driver handles interrupts at all, but at least it compiles now.

sys/i386/isa/bs/bsif.h

@@ -117,7 +117,6 @@
 #include <machine/cpu.h>
 #include <machine/md_var.h>
 #include <machine/vmparam.h>
-#include <machine/ipl.h>
 #include <machine/dvcfg.h>
 
 #include <cam/scsi/scsi_all.h>
@@ -209,12 +208,8 @@ static BS_INLINE void memcopy __P((void *from, void *to, register size_t len));
 u_int32_t bs_adapter_info __P((int));
 #define delay(y) DELAY(y)
 extern int dma_init_flag;
-extern	volatile u_int spending;
 
-#define softintr(y)	do {			\
-	atomic_set_int(&spending, 1 << y);	\
-	sched_softintr();					\
-} while(0);
+#define softintr(y)
 
 static BS_INLINE void
 memcopy(from, to, len)