spi: fsl-dspi: Remove unneeded cast to same type

There is never a need to cast a pointer to the same pointer type.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/a417735ca3ff629ee897327b163b23414673f0a3.1678704562.git.geert+renesas@glider.beSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-fsl-dspi.c

@@ -1068,7 +1068,7 @@ static int dspi_setup(struct spi_device *spi)
 
 static void dspi_cleanup(struct spi_device *spi)
 {
-	struct chip_data *chip = spi_get_ctldata((struct spi_device *)spi);
+	struct chip_data *chip = spi_get_ctldata(spi);
 
 	dev_dbg(&spi->dev, "spi_device %u.%u cleanup\n",
 		spi->controller->bus_num, spi_get_chipselect(spi, 0));