DMA: shdma: shdma_chan_filter() has to be in shdma-base.h

shdma_chan_filter() is a function, provided by the shdma-base.c module,
move its declaration to the appropriate header.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

include/linux/sh_dma.h

@@ -99,6 +99,4 @@ struct sh_dmae_pdata {
 #define CHCR_TE	0x00000002
 #define CHCR_IE	0x00000004
 
-bool shdma_chan_filter(struct dma_chan *chan, void *arg);
-
 #endif

include/linux/shdma-base.h

@@ -122,5 +122,6 @@ void shdma_chan_remove(struct shdma_chan *schan);
 int shdma_init(struct device *dev, struct shdma_dev *sdev,
 		    int chan_num);
 void shdma_cleanup(struct shdma_dev *sdev);
+bool shdma_chan_filter(struct dma_chan *chan, void *arg);
 
 #endif