spi: davinci: remove set but not used variable 'pdata'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/spi/spi-davinci.c: In function 'davinci_spi_setup':
drivers/spi/spi-davinci.c:422:36: warning:
 variable 'pdata' set but not used [-Wunused-but-set-variable]

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-davinci.c

@@ -419,13 +419,11 @@ static int davinci_spi_setup(struct spi_device *spi)
 {
 	int retval = 0;
 	struct davinci_spi *dspi;
-	struct davinci_spi_platform_data *pdata;
 	struct spi_master *master = spi->master;
 	struct device_node *np = spi->dev.of_node;
 	bool internal_cs = true;
 
 	dspi = spi_master_get_devdata(spi->master);
-	pdata = &dspi->pdata;
 
 	if (!(spi->mode & SPI_NO_CS)) {
 		if (np && (master->cs_gpios != NULL) && (spi->cs_gpio >= 0)) {