[SCSI] wd33c93: fix up cut and paste error

The three drivers: a2091, gvp11 and mvme147 have erroneous references
to a3000_host.  Fix these to be references to the proper host
variable.

Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/gvp11.c

@@ -322,9 +322,9 @@ int __init gvp11_detect(struct scsi_host_template *tpnt)
 	 */
 	regs.SASR = &(DMA(instance)->SASR);
 	regs.SCMD = &(DMA(instance)->SCMD);
-	HDATA(a3000_host)->no_sync = 0xff;
-	HDATA(a3000_host)->fast = 0;
-	HDATA(a3000_host)->dma_mode = CTRL_DMA;
+	HDATA(instance)->no_sync = 0xff;
+	HDATA(instance)->fast = 0;
+	HDATA(instance)->dma_mode = CTRL_DMA;
 	wd33c93_init(instance, regs, dma_setup, dma_stop,
 		     (epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10
 					     : WD33C93_FS_12_15);