add scsi module, when SCSI support is used as kernel module

mk/modules.mk

@@ -568,6 +568,7 @@ $(eval $(call KMOD_template,BLK_DEV_NBD,blk-dev-nbd,\
 
 $(eval $(call KMOD_template,SCSI,scsi,\
     $(MODULES_DIR)/kernel/drivers/scsi/scsi_wait_scan \
+    $(MODULES_DIR)/kernel/drivers/scsi/scsi_mod \
 ,20))
 
 $(eval $(call KMOD_template,BLK_DEV_SD,blk-dev-sd,\