dma: mv_xor: remove mv_desc_get_dest_addr()

The following commit:

54f8d501e842 dmaengine: remove DMA unmap from drivers

removed the last caller to mv_desc_get_dest_addr(), creating the
warning:

drivers/dma/mv_xor.c:57:12: warning: mv_desc_get_dest_addr defined
but not used [-Wunused-function]

Remove it.

Signed-off-by: Jason Cooper <[e-mail]>
Acked-by: Vinod Koul <[e-mail]>
Signed-off-by: Dan Williams <[e-mail]>

drivers/dma/mv_xor.c

···
 	hw_desc->desc_command = (1 << 31);
 }
 
-static u32 mv_desc_get_dest_addr(struct mv_xor_desc_slot *desc)
-{
-	struct mv_xor_desc *hw_desc = desc->hw_desc;
-	return hw_desc->phy_dest_addr;
-}
-
 static void mv_desc_set_byte_count(struct mv_xor_desc_slot *desc,
 				   u32 byte_count)
 {