[PATCH] ISA DMA Kconfig fixes - part 4 (irda)

* net/irda/irda_device.c::irda_setup_dma() made conditional on
   ISA_DMA_API (it uses helpers in question and irda is usable on
   platforms that don't have them at all - think of USB IRDA, for
   example).
 * irda drivers that depend on ISA DMA marked as dependent on
   ISA_DMA_API

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

net/irda/irda_device.c

@@ -470,6 +470,7 @@ void irda_device_unregister_dongle(struct dongle_reg *dongle)
 }
 EXPORT_SYMBOL(irda_device_unregister_dongle);
 
+#ifdef CONFIG_ISA_DMA_API
 /*
  * Function setup_dma (idev, buffer, count, mode)
  *
@@ -492,3 +493,4 @@ void irda_setup_dma(int channel, dma_addr_t buffer, int count, int mode)
 	release_dma_lock(flags);
 }
 EXPORT_SYMBOL(irda_setup_dma);
+#endif