[SCSI] remove aic7xxx busyq

The aic7xxx driver has two spurious queues in it's linux glue code: the
busyq which queues incoming commands to the driver and the completeq
which queues finished commands before sending them back to the mid-layer

This patch just removes the busyq and makes the aic finally return the
correct status to get the mid-layer to manage its queueing, so a command
is either committed to the sequencer or returned to the midlayer for
requeue.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/aic7xxx/aic7xxx_osm.h

@@ -66,11 +66,11 @@
 #include <linux/pci.h>
 #include <linux/smp_lock.h>
 #include <linux/version.h>
+#include <linux/interrupt.h>
 #include <linux/module.h>
 #include <asm/byteorder.h>
 #include <asm/io.h>
 
-#include <linux/interrupt.h> /* For tasklet support. */
 #include <linux/config.h>
 #include <linux/slab.h>
 
@@ -341,7 +341,6 @@ typedef enum {
 struct ahc_linux_target;
 struct ahc_linux_device {
 	TAILQ_ENTRY(ahc_linux_device) links;
-	struct		ahc_busyq busyq;
 
 	/*
 	 * The number of transactions currently
@@ -488,7 +487,6 @@ struct ahc_platform_data {
 	struct ahc_completeq	 completeq;
 
 	spinlock_t		 spin_lock;
-	struct tasklet_struct	 runq_tasklet;
 	u_int			 qfrozen;
 	pid_t			 dv_pid;
 	struct timer_list	 completeq_timer;