mfd: dln2: add support for USB-SPI module

Signed-off-by: Laurentiu Palcu <[e-mail]>

drivers/mfd/dln2.c

···
 	DLN2_HANDLE_CTRL,
 	DLN2_HANDLE_GPIO,
 	DLN2_HANDLE_I2C,
+	DLN2_HANDLE_SPI,
 	DLN2_HANDLES
 };
 
···
 	.port = 0,
 };
 
+/* Only one SPI port supported */
+static struct dln2_platform_data dln2_pdata_spi = {
+	.handle = DLN2_HANDLE_SPI,
+	.port = 0,
+};
+
 static const struct mfd_cell dln2_devs[] = {
 	{
 		.name = "dln2-gpio",
···
 	{
 		.name = "dln2-i2c",
 		.platform_data = &dln2_pdata_i2c,
+		.pdata_size = sizeof(struct dln2_platform_data),
+	},
+	{
+		.name = "dln2-spi",
+		.platform_data = &dln2_pdata_spi,
 		.pdata_size = sizeof(struct dln2_platform_data),
 	},
 };