staging: wfx: declare the field 'packet_id' with native byte order

The field packet_id is not interpreted by the device. It is only used as
identifier for the device answer. So it is not necessary to declare it
little endian. It fixes some warnings raised by Sparse without
complexifying the code.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200512150414.267198-12-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/hif_api_cmd.h

@@ -254,7 +254,9 @@ struct hif_ht_tx_parameters {
 } __packed;
 
 struct hif_req_tx {
-	__le32 packet_id;
+	// packet_id is not interpreted by the device, so it is not necessary to
+	// declare it little endian
+	u32    packet_id;
 	u8     max_tx_rate;
 	struct hif_queue queue_id;
 	struct hif_data_flags data_flags;
@@ -283,7 +285,9 @@ struct hif_tx_result_flags {
 
 struct hif_cnf_tx {
 	__le32 status;
-	__le32 packet_id;
+	// packet_id is copied from struct hif_req_tx without been interpreted
+	// by the device, so it is not necessary to declare it little endian
+	u32    packet_id;
 	u8     txed_rate;
 	u8     ack_failures;
 	struct hif_tx_result_flags tx_result_flags;