sparc32 has working dma-mapping only with CONFIG_PCI

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/sparc/Kconfig

@@ -217,6 +217,9 @@ source "drivers/pci/Kconfig"
 
 endif
 
+config NO_DMA
+	def_bool !PCI
+
 config SUN_OPENPROMFS
 	tristate "Openprom tree appears in /proc/openprom"
 	help