[SCSI] advansys: Make advansys_board_found a little more readable

 - Put all the error cleanup at the end of the function and goto the
   appropriate label
 - Split advansys_wide_init_chip out of advansys_board_found
 - Split advansys_wide_free_mem out of advansys_board_found.  Use it
   from advansys_release
 - Use GFP_KERNEL, not GFP_ATOMIC, when allocating memory during
   initialisation
 - Eliminate lots of PROC_FS ifdefs by removing the ifdefs around the prtbuf
   struct member

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