ieee1394: sbp2: Kconfig fix

We only support x86 and ppc, due to the use of bus_to_virt() and friends.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NBen Collins <bcollins@ubuntu.com>

drivers/ieee1394/Kconfig

@@ -129,7 +129,7 @@ config IEEE1394_SBP2
 
 config IEEE1394_SBP2_PHYS_DMA
 	bool "Enable replacement for physical DMA in SBP2"
-	depends on IEEE1394 && IEEE1394_SBP2 && EXPERIMENTAL
+	depends on IEEE1394 && IEEE1394_SBP2 && EXPERIMENTAL && (X86_32 || PPC_32)
 	help
 	  This builds sbp2 for use with non-OHCI host adapters which do not
 	  support physical DMA or for when ohci1394 is run with phys_dma=0.