greybus: spi: move chipselect to one byte size

Fixed in the specification, some values for chipselect count and index
were different in size, just fix that for all reference to chipselect
and move all to one byte size and remove byte order operations.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/greybus_protocols.h

@@ -662,11 +662,11 @@ struct gb_spi_master_config_response {
 	__le32	max_speed_hz;
 	__le16	mode;
 	__le16	flags;
-	__le16	num_chipselect;
+	__u8	num_chipselect;
 } __packed;
 
 struct gb_spi_device_config_request {
-	__le16	chip_select;
+	__u8	chip_select;
 } __packed;
 
 struct gb_spi_device_config_response {

drivers/staging/greybus/spi.c

@@ -20,7 +20,7 @@ struct gb_spi {
 	u16			mode;
 	u16			flags;
 	u32			bits_per_word_mask;
-	u16			num_chipselect;
+	u8			num_chipselect;
 	u32			min_speed_hz;
 	u32			max_speed_hz;
 	struct spi_device	*spi_devices;
@@ -270,7 +270,7 @@ static int gb_spi_get_master_config(struct gb_spi *spi)
 	spi->flags = gb_spi_flags_map(flags);
 
 	spi->bits_per_word_mask = le32_to_cpu(response.bits_per_word_mask);
-	spi->num_chipselect = le16_to_cpu(response.num_chipselect);
+	spi->num_chipselect = response.num_chipselect;
 
 	spi->min_speed_hz = le32_to_cpu(response.min_speed_hz);
 	spi->max_speed_hz = le32_to_cpu(response.max_speed_hz);
@@ -278,7 +278,7 @@ static int gb_spi_get_master_config(struct gb_spi *spi)
 	return 0;
 }
 
-static int gb_spi_setup_device(struct gb_spi *spi, uint16_t cs)
+static int gb_spi_setup_device(struct gb_spi *spi, u8 cs)
 {
 	struct spi_master *master = get_master_from_spi(spi);
 	struct gb_spi_device_config_request request;
@@ -287,7 +287,7 @@ static int gb_spi_setup_device(struct gb_spi *spi, uint16_t cs)
 	struct spi_device *spidev = &spi->spi_devices[cs];
 	int ret;
 
-	request.chip_select = cpu_to_le16(cs);
+	request.chip_select = cs;
 
 	ret = gb_operation_sync(spi->connection, GB_SPI_TYPE_DEVICE_CONFIG,
 				&request, sizeof(request),
@@ -331,7 +331,7 @@ static int gb_spi_connection_init(struct gb_connection *connection)
 	struct gb_spi *spi;
 	struct spi_master *master;
 	int ret;
-	int i;
+	u8 i;
 
 	/* Allocate master with space for data */
 	master = spi_alloc_master(&connection->bundle->dev, sizeof(*spi));