advansys fix on ISA-less configs

The code

        if (shost->dma_channel != NO_ISA_DMA)
                free_dma(shost->dma_channel);

in there is triggerable only if we have CONFIG_ISA (we only set ->dma_channel to
something other than NO_ISA_DMA under #ifdef CONFIG_ISA).  OTOH, free_dma() is
not guaranteed to be there in absense of CONFIG_ISA.  IOW, driver runs into
undefined symbols on PCI-but-not-ISA configs (e.g. on frv) and it's a false
positive.

Fix: put the entire if () under #ifdef CONFIG_ISA; behaviour doesn't change and
dependency on free_dma() disappears for !CONFIG_ISA.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/scsi/advansys.c

@@ -13872,8 +13872,10 @@ static int __devinit advansys_board_found(struct Scsi_Host *shost,
 	advansys_wide_free_mem(boardp);
 	free_irq(boardp->irq, shost);
  err_free_dma:
+#ifdef CONFIG_ISA
 	if (shost->dma_channel != NO_ISA_DMA)
 		free_dma(shost->dma_channel);
+#endif
  err_free_proc:
 	kfree(boardp->prtbuf);
  err_unmap:
@@ -13894,10 +13896,12 @@ static int advansys_release(struct Scsi_Host *shost)
 	ASC_DBG(1, "begin\n");
 	scsi_remove_host(shost);
 	free_irq(board->irq, shost);
+#ifdef CONFIG_ISA
 	if (shost->dma_channel != NO_ISA_DMA) {
 		ASC_DBG(1, "free_dma()\n");
 		free_dma(shost->dma_channel);
 	}
+#endif
 	if (ASC_NARROW_BOARD(board)) {
 		dma_unmap_single(board->dev,
 					board->dvc_var.asc_dvc_var.overrun_dma,