staging: pi433: Use matching enum types calling rf69_set_packet_format

This patch fixes the following four warnings found using sparse:

drivers/staging/pi433/pi433_if.c:211:9: warning: mixing different enum types
drivers/staging/pi433/pi433_if.c:211:9:     int enum optionOnOff  versus
drivers/staging/pi433/pi433_if.c:211:9:     int enum packetFormat
drivers/staging/pi433/pi433_if.c:211:9: warning: mixing different enum types
drivers/staging/pi433/pi433_if.c:211:9:     int enum optionOnOff  versus
drivers/staging/pi433/pi433_if.c:211:9:     int enum packetFormat
drivers/staging/pi433/pi433_if.c:268:9: warning: mixing different enum types
drivers/staging/pi433/pi433_if.c:268:9:     int enum optionOnOff  versus
drivers/staging/pi433/pi433_if.c:268:9:     int enum packetFormat
drivers/staging/pi433/pi433_if.c:268:9: warning: mixing different enum types
drivers/staging/pi433/pi433_if.c:268:9:     int enum optionOnOff  versus
drivers/staging/pi433/pi433_if.c:268:9:     int enum packetFormat

This is done calling the rf69_set_packet_format function using the
appropriate enum for the packetFormat argument.
Signed-off-by: Elia Geretto <elia.f.geretto@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/pi433/pi433_if.c

@@ -184,6 +184,7 @@ static void *DIO_irq_handler[NUM_DIO] = {
 static int
 rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 {
+	int ret;
 	int payload_length;
 
 	/* receiver config */
@@ -210,7 +211,15 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 	{
 		SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, always));
 	}
-	SET_CHECKED(rf69_set_packet_format  (dev->spi, rx_cfg->enable_length_byte));
+	if (rx_cfg->enable_length_byte == optionOn) {
+		ret = rf69_set_packet_format(dev->spi, packetLengthVar);
+		if (ret < 0)
+			return ret;
+	} else {
+		ret = rf69_set_packet_format(dev->spi, packetLengthFix);
+		if (ret < 0)
+			return ret;
+	}
 	SET_CHECKED(rf69_set_adressFiltering(dev->spi, rx_cfg->enable_address_filtering));
 	SET_CHECKED(rf69_set_crc_enable	    (dev->spi, rx_cfg->enable_crc));
 
@@ -249,6 +258,8 @@ rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
 static int
 rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
 {
+	int ret;
+
 	SET_CHECKED(rf69_set_frequency	(dev->spi, tx_cfg->frequency));
 	SET_CHECKED(rf69_set_bit_rate	(dev->spi, tx_cfg->bit_rate));
 	SET_CHECKED(rf69_set_modulation	(dev->spi, tx_cfg->modulation));
@@ -267,7 +278,15 @@ rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
 		SET_CHECKED(rf69_set_preamble_length(dev->spi, 0));
 	}
 	SET_CHECKED(rf69_set_sync_enable  (dev->spi, tx_cfg->enable_sync));
-	SET_CHECKED(rf69_set_packet_format(dev->spi, tx_cfg->enable_length_byte));
+	if (tx_cfg->enable_length_byte == optionOn) {
+		ret = rf69_set_packet_format(dev->spi, packetLengthVar);
+		if (ret < 0)
+			return ret;
+	} else {
+		ret = rf69_set_packet_format(dev->spi, packetLengthFix);
+		if (ret < 0)
+			return ret;
+	}
 	SET_CHECKED(rf69_set_crc_enable	  (dev->spi, tx_cfg->enable_crc));
 
 	/* configure sync, if enabled */