Minor bug in SCSI definition

Coverity found an issue in this area which I tracked down to the incorrect definition patched below.

The SID_QUAL macro is (((inq_data)->device & 0xE0) >> 5) which extracts the peripheral qualifier.
Per SCSI-2 (draft 10L) table 46, the vendor-specific values are "1XXb".

This probably affects almost nobody, but it will clear up a couple of Coverity warnings.

Anton

Index: sys/cam/scsi/scsi_all.h
===================================================================
--- sys/cam/scsi/scsi_all.h     (revision 274352)
+++ sys/cam/scsi/scsi_all.h  (working copy)
_at__at_ -1817,7 +1817,7 _at__at_
                                                            * reserved for this peripheral
                                                            * qualifier.
                                                            */
-#define          SID_QUAL_IS_VENDOR_UNIQUE(inq_data) ((SID_QUAL(inq_data) & 0x08) != 0)
+#define         SID_QUAL_IS_VENDOR_UNIQUE(inq_data) ((SID_QUAL(inq_data) & 0x04) != 0)
           u_int8_t dev_qual2;
#define          SID_QUAL2  0x7F
#define          SID_LU_CONG        0x40