8xxx: Rename dma_xfer() to dmacpy()

Also update dmacpy()'s argument order to match memcpy's and use
phys_addr_t/phy_size_t for address/size arguments

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/drivers/dma/fsl_dma.c b/drivers/dma/fsl_dma.c
index f058802..49ea8f1 100644
--- a/drivers/dma/fsl_dma.c
+++ b/drivers/dma/fsl_dma.c
@@ -78,7 +78,7 @@
 	dma_sync();
 }
 
-int dma_xfer(void *dest, uint count, void *src) {
+int dmacpy(phys_addr_t dest, phys_addr_t src, phys_size_t count) {
 	volatile fsl_dma_t *dma = &dma_base->dma[0];
 	uint xfer_size;