[PATCH] Fix size of object being freed in atascsi.c

[Nick Permyakov]

Fixed a boot panic on my machine.

Index: atascsi.c
===================================================================
RCS file: /cvs/src/sys/dev/ata/atascsi.c,v
retrieving revision 1.127
diff -u -p -r1.127 atascsi.c
--- atascsi.c    3 Jan 2016 21:07:46 -0000    1.127
+++ atascsi.c    14 Mar 2016 11:46:21 -0000
@@ -491,7 +491,7 @@ atascsi_free(struct scsi_link *link)
          * free ahp itself.  this relies on the order luns are
          * detached in scsi_detach_target().
          */
-        free(ahp, M_DEVBUF, sizeof(*ap));
+        free(ahp, M_DEVBUF, sizeof(*ahp));
         as->as_host_ports[port] = NULL;
     }
 }