dmaengine: sh: rz-dmac: Remove unused rz_dmac_chan.*_word_size

The src_word_size and dst_word_size members of the rz_dmac_chan
structure were never used, so they can be removed.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Biju Das <[e-mail]>
Link: https://lore.kernel.org/r/021bd[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/sh/rz-dmac.c

···
 	struct rz_dmac_desc *desc;
 	int descs_allocated;
 
-	enum dma_slave_buswidth src_word_size;
-	enum dma_slave_buswidth dst_word_size;
 	dma_addr_t src_per_address;
 	dma_addr_t dst_per_address;
 
···
 	u32 val;
 
 	channel->src_per_address = config->src_addr;
-	channel->src_word_size = config->src_addr_width;
 	channel->dst_per_address = config->dst_addr;
-	channel->dst_word_size = config->dst_addr_width;
 
 	val = rz_dmac_ds_to_val_mapping(config->dst_addr_width);
 	if (val == CHCFG_DS_INVALID)