spi: pxa2xx: Use local struct spi_master pointer in pump_transfers()

We will find more use for struct spi_master pointer in pump_transfers()
and code will be more readable if we access it using local pointer than
through the drv_data->master.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pxa2xx.c

@@ -915,6 +915,7 @@ static unsigned int pxa2xx_ssp_get_clk_div(struct driver_data *drv_data,
 static void pump_transfers(unsigned long data)
 {
 	struct driver_data *drv_data = (struct driver_data *)data;
+	struct spi_master *master = drv_data->master;
 	struct spi_message *message = NULL;
 	struct spi_transfer *transfer = NULL;
 	struct spi_transfer *previous = NULL;
@@ -1072,12 +1073,12 @@ static void pump_transfers(unsigned long data)
 	cr0 = pxa2xx_configure_sscr0(drv_data, clk_div, bits);
 	if (!pxa25x_ssp_comp(drv_data))
 		dev_dbg(&message->spi->dev, "%u Hz actual, %s\n",
-			drv_data->master->max_speed_hz
+			master->max_speed_hz
 				/ (1 + ((cr0 & SSCR0_SCR(0xfff)) >> 8)),
 			drv_data->dma_mapped ? "DMA" : "PIO");
 	else
 		dev_dbg(&message->spi->dev, "%u Hz actual, %s\n",
-			drv_data->master->max_speed_hz / 2
+			master->max_speed_hz / 2
 				/ (1 + ((cr0 & SSCR0_SCR(0x0ff)) >> 8)),
 			drv_data->dma_mapped ? "DMA" : "PIO");