dmaengine: add a driver for AMBA AXI NBPF DMAC IP cores

This patch adds a driver for NBPF DMAC IP cores from Renesas, designed for
the AMBA AXI bus.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index d08bd96..f2b831a 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -47,4 +47,5 @@
 obj-$(CONFIG_FSL_EDMA) += fsl-edma.o
 obj-$(CONFIG_QCOM_BAM_DMA) += qcom_bam_dma.o
 obj-y += xilinx/
+obj-$(CONFIG_NBPFAXI_DMA) += nbpfaxi.o
 obj-$(CONFIG_DMA_SUN6I) += sun6i-dma.o