dmaengine: ioatdma: removal of dma_v3.c and relevant ioat3 references

Moving the relevant functions to their respective .c files and removal of
dma_v3.c file. Also removed various ioat3 references when appropriate.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/ioat/Makefile b/drivers/dma/ioat/Makefile
index 3a7e664..cf5fedb 100644
--- a/drivers/dma/ioat/Makefile
+++ b/drivers/dma/ioat/Makefile
@@ -1,2 +1,2 @@
 obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o
-ioatdma-y := init.o dma.o dma_v3.o prep.o dca.o sysfs.o
+ioatdma-y := init.o dma.o prep.o dca.o sysfs.o