spi: omap: Allocate bus number from spi framework

spi framework should allocate bus number dynamically either
via Linux IDR or spi alias for master drivers. This patch deletes
code pertaining to manual allocation of spi bus number in spi omap2
master driver.
Signed-off-by: Suniel Mahesh <sunil.m@techveda.org>
Signed-off-by: Karthik Tummala <karthik@techveda.org>
Tested-by: Karthik Tummala <karthik@techveda.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-omap2-mcspi.c

@@ -1338,7 +1338,6 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
 	struct resource		*r;
 	int			status = 0, i;
 	u32			regs_offset = 0;
-	static int		bus_num = 1;
 	struct device_node	*node = pdev->dev.of_node;
 	const struct of_device_id *match;
 
@@ -1374,14 +1373,11 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
 
 		of_property_read_u32(node, "ti,spi-num-cs", &num_cs);
 		master->num_chipselect = num_cs;
-		master->bus_num = bus_num++;
 		if (of_get_property(node, "ti,pindir-d0-out-d1-in", NULL))
 			mcspi->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN;
 	} else {
 		pdata = dev_get_platdata(&pdev->dev);
 		master->num_chipselect = pdata->num_cs;
-		if (pdev->id != -1)
-			master->bus_num = pdev->id;
 		mcspi->pin_dir = pdata->pin_dir;
 	}
 	regs_offset = pdata->regs_offset;