[SCSI] advansys: remove INQUIRY sniffing

Use slave_configure() to do all the work that used to be done in
AscInquiryHandling and AdvInquiryHandling.  Split slave_configure into
two functions, one for wide and one for narrow controllers.

Remove some unused definitions, duplicate definitions, unnecessary
declarations, and scsireqq, cap_info and inquiry from struct asc_board.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>