From: Pavel Machek <pavel@ucw.cz>

Marks threads as needed for suspend.
DESC
aic79xx_osm.c build fix
EDESC

drivers/scsi/aic7xxx/aic79xx_osm.c: In function `ahd_linux_dv_thread':
drivers/scsi/aic7xxx/aic79xx_osm.c:2594: `PF_IOTHREAD' undeclared (first use in this function)