Revert "[ARM] pxa: remove now unnecessary dma_needs_bounce()"

[Russell King - ARM Linux]

On Mon, Mar 21, 2011 at 03:21:24PM +0800, Eric Miao wrote:
> Hrm... checked again. The IXP4xx build regression seems to have been fixed
> by the below commits:
> 
> 88a5810 ARM: fix IXP4xx build failure
> 710224f arm: fix "arm: fix pci_set_consistent_dma_mask for dmabounce devices"

Annoyingly, no one reported what the actual error messages with IXP4xx
were, so we can only guess at this point.

Eric's patch (4fa5518) did this:

+#ifdef CONFIG_SA1111
 extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
+#else
+static inline int dma_needs_bounce(struct device *dev, dma_addr_t addr,
+                                  size_t size)
+{
+       return 0;
+}
+#endif

which assumes that SA1111 is the _only_ user of the dma_needs_bounce()
function.  This is incorrect as IXP4xx also has an implementation.

So, reapplying the original patch will immediately reintroduce the
IXP4xx build failure as we end up with two functions called
dma_needs_bounce().