I/OAT: Rename the source file

Rename the ioatdma.c file in preparation for splitting into multiple files,
which will allow for easier adding new functionality.

Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/dma/Makefile

@@ -1,4 +1,5 @@
 obj-$(CONFIG_DMA_ENGINE) += dmaengine.o
 obj-$(CONFIG_NET_DMA) += iovlock.o
 obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o
+ioatdma-objs := ioat_dma.o
 obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o

drivers/dma/ioatdma.c → drivers/dma/ioat_dma.c

@@ -141,7 +141,7 @@ ioat_tx_submit(struct dma_async_tx_descriptor *tx)
 	if (append)
 		writeb(IOAT_CHANCMD_APPEND,
 			ioat_chan->reg_base + IOAT_CHANCMD_OFFSET);
-	
+
 	return cookie;
 }