spi: revert master->setup function removal for altera and nuc900

Commit 24778be "spi: convert drivers to use bits_per_word_mask" removed
what appeared to be redundant code from many drivers. However, it
appears that in the spi-bitbang case, these functions are required by
the spi-bitbang core, even if they don't do anything. Restore them.

For 3.12, the spi-bitbang core should be adjusted not to require these
callbacks to exist if they don't need to do anything.

This is the equivalent of Michal Simek's patch "spi/xilinx: Revert
master->setup function removal", applied to other affected drivers.

Signed-off-by: Stephen Warren <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-altera.c

···
 	}
 }
 
+static int altera_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
+{
+	return 0;
+}
+
+static int altera_spi_setup(struct spi_device *spi)
+{
+	return 0;
+}
+
 static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
 {
 	if (hw->tx) {
···
 	master->bus_num = pdev->id;
 	master->num_chipselect = 16;
 	master->mode_bits = SPI_CS_HIGH;
+	master->setup = altera_spi_setup;
 
 	hw = spi_master_get_devdata(master);
 	platform_set_drvdata(pdev, hw);
···
 	hw->bitbang.master = spi_master_get(master);
 	if (!hw->bitbang.master)
 		return err;
+	hw->bitbang.setup_transfer = altera_spi_setupxfer;
 	hw->bitbang.chipselect = altera_spi_chipsel;
 	hw->bitbang.txrx_bufs = altera_spi_txrx;
 

drivers/spi/spi-nuc900.c

···
 	spin_unlock_irqrestore(&hw->lock, flags);
 }
 
+static int nuc900_spi_setupxfer(struct spi_device *spi,
+				 struct spi_transfer *t)
+{
+	return 0;
+}
+
+static int nuc900_spi_setup(struct spi_device *spi)
+{
+	return 0;
+}
+
 static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
 {
 	return hw->tx ? hw->tx[count] : 0;
···
 	master->num_chipselect     = hw->pdata->num_cs;
 	master->bus_num            = hw->pdata->bus_num;
 	hw->bitbang.master         = hw->master;
+	hw->bitbang.setup_transfer = nuc900_spi_setupxfer;
 	hw->bitbang.chipselect     = nuc900_spi_chipsel;
 	hw->bitbang.txrx_bufs      = nuc900_spi_txrx;
+	hw->bitbang.master->setup  = nuc900_spi_setup;
 
 	hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (hw->res == NULL) {