dmaengine: dw-edma: Drop unused dchan2dev() and chan2dev()

Static functions dchan2dev() and chan2dev() are not used, W=1 build:

  dw-edma-core.c:27:16: error: unused function 'dchan2dev' [-Werror,-Wunused-function]
  dw-edma-core.c:33:16: error: unused function 'chan2dev' [-Werror,-Wunused-function]

Fixes: e63d79d ("dmaengine: Add Synopsys eDMA IP core driver")
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: krzk

drivers/dma/dw-edma/dw-edma-core.c

@@ -23,18 +23,6 @@
 #include "../dmaengine.h"
 #include "../virt-dma.h"
 
-static inline
-struct device *dchan2dev(struct dma_chan *dchan)
-{
-	return &dchan->dev->device;
-}
-
-static inline
-struct device *chan2dev(struct dw_edma_chan *chan)
-{
-	return &chan->vc.chan.dev->device;
-}
-
 static inline
 struct dw_edma_desc *vd2dw_edma_desc(struct virt_dma_desc *vd)
 {