sparc64: Remove pointless assignment in floppy support.

Reported-by: Josip Rodin <joy@entuzijast.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/floppy_64.h

@@ -191,7 +191,6 @@ static void sun_fd_set_dma_count(int length)
 
 static void sun_fd_enable_dma(void)
 {
-	pdma_vaddr = pdma_vaddr;
 	pdma_base = pdma_vaddr;
 	pdma_areasize = pdma_size;
 }