o scsi/imm.h: use c99 style initialization

  As far as I verified this also fixes a bug when doing the
  table lookup for IMM_EPP_32, that would result in "Unknown"
  as IMM_EPP_32 is equal to 6 and there is the #ifdef...

ChangeSet@1.1386, 2003-09-02 00:11:07-03:00, acme@allegro.kerneljanitors.org
  o scsi/*.h: remove not needed #define NULL

ChangeSet@1.1385, 2003-09-02 00:05:16-03:00, acme@allegro.kerneljanitors.org
  o scsi/3w-xxx.h: use c99 style init