sym2 speed selection fix

From: Alex Tomas <alex@clusterfs.com>

without following patch I couldn't get 160MB from my disk.  removed line
restores previous clocking value (0 in my case).  so, driver thinks disk
isn't DT-capable ...

drivers/scsi/sym53c8xx_2/sym_misc.c

@@ -328,7 +328,6 @@ printf("XXXXXX [%d] inq_version=%x inq_byte7=%x inq_byte56=%x XXXXX\n",
 	    tp->inq_byte56  != inq_byte56) {
 		tp->inq_version = inq_version;
 		tp->inq_byte7   = inq_byte7;
-		tp->inq_byte56  = inq_byte56;
 		return 1;
 	}
 	return 0;