i2c: cpm: remove casting dma_alloc

Generated by: alloc_cast.cocci

Signed-off-by: Vasyl Gomonovych <[e-mail]>
Acked-by: Jochen Friedrich <[e-mail]>
Signed-off-by: Wolfram Sang <[e-mail]>

drivers/i2c/busses/i2c-cpm.c

···
 		}
 		out_be32(&rbdf[i].cbd_bufaddr, ((cpm->rxdma[i] + 1) & ~1));
 
-		cpm->txbuf[i] = (unsigned char *)dma_alloc_coherent(&cpm->ofdev->dev, CPM_MAX_READ + 1, &cpm->txdma[i], GFP_KERNEL);
+		cpm->txbuf[i] = dma_alloc_coherent(&cpm->ofdev->dev,
+						   CPM_MAX_READ + 1,
+						   &cpm->txdma[i], GFP_KERNEL);
 		if (!cpm->txbuf[i]) {
 			ret = -ENOMEM;
 			goto out_muram;