spi: davinci: set chip-select mode in SPIDEF only once

Quit writing the same constant value determining the chip-select
mode when no transmissions are in progress in davinci_spi_chipelect().

Instead just setup the SPIDEF register once during probe.
Signed-off-by: NBrian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: NMichael Williamson <michael.williamson@criticallink.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

drivers/spi/davinci_spi.c

@@ -245,8 +245,6 @@ static void davinci_spi_chipselect(struct spi_device *spi, int value)
 	 * line for the controller
 	 */
 	if (value == BITBANG_CS_INACTIVE) {
-		set_io_bits(davinci_spi->base + SPIDEF, CS_DEFAULT);
-
 		data1_reg_val |= CS_DEFAULT << SPIDAT1_CSNR_SHIFT;
 		iowrite32(data1_reg_val, davinci_spi->base + SPIDAT1);
 
@@ -1132,6 +1130,8 @@ static int davinci_spi_probe(struct platform_device *pdev)
 		clear_io_bits(davinci_spi->base + SPIGCR1,
 				SPIGCR1_CLKMOD_MASK);
 
+	iowrite32(CS_DEFAULT, davinci_spi->base + SPIDEF);
+
 	/* master mode default */
 	set_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_MASTER_MASK);