spi: spi-pxa2xx: Remove unused legacy PXA DMA API channel numbers

These became unused by the commit 6356437e
("spi: spi-pxa2xx: remove legacy PXA DMA bits").
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pxa2xx.c

@@ -1475,8 +1475,6 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	}
 
 	/* Setup DMA if requested */
-	drv_data->tx_channel = -1;
-	drv_data->rx_channel = -1;
 	if (platform_info->enable_dma) {
 		status = pxa2xx_spi_dma_setup(drv_data);
 		if (status) {

drivers/spi/spi-pxa2xx.h

@@ -37,8 +37,6 @@ struct driver_data {
 	struct pxa2xx_spi_master *master_info;
 
 	/* PXA private DMA setup stuff */
-	int rx_channel;
-	int tx_channel;
 	u32 *null_dma_buf;
 
 	/* SSP register addresses */