staging: wilc1000: Merge memcpy + le32_to_cpus to get_unaligned_le32

Merge the combo use of memcpy and le32_to_cpus.
Use get_unaligned_le32 instead.
This simplifies the code.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Link: https://lore.kernel.org/r/20190725025203.8772-1-hslester96@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/wilc_mon.c

@@ -35,8 +35,7 @@ void wilc_wfi_monitor_rx(struct net_device *mon_dev, u8 *buff, u32 size)
 		return;
 
 	/* Get WILC header */
-	memcpy(&header, (buff - HOST_HDR_OFFSET), HOST_HDR_OFFSET);
-	le32_to_cpus(&header);
+	header = get_unaligned_le32(buff - HOST_HDR_OFFSET);
 	/*
 	 * The packet offset field contain info about what type of management
 	 * the frame we are dealing with and ack status

drivers/staging/wilc1000/wilc_wfi_cfgoperations.c

@@ -1038,8 +1038,7 @@ void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size)
 	s32 freq;
 	__le16 fc;
 
-	memcpy(&header, (buff - HOST_HDR_OFFSET), HOST_HDR_OFFSET);
-	le32_to_cpus(&header);
+	header = get_unaligned_le32(buff - HOST_HDR_OFFSET);
 	pkt_offset = GET_PKT_OFFSET(header);
 
 	if (pkt_offset & IS_MANAGMEMENT_CALLBACK) {

drivers/staging/wilc1000/wilc_wlan.c

@@ -703,8 +703,7 @@ static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
 
 	do {
 		buff_ptr = buffer + offset;
-		memcpy(&header, buff_ptr, 4);
-		le32_to_cpus(&header);
+		header = get_unaligned_le32(buff_ptr);
 
 		is_cfg_packet = (header >> 31) & 0x1;
 		pkt_offset = (header >> 22) & 0x1ff;
@@ -874,10 +873,8 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 
 	offset = 0;
 	do {
-		memcpy(&addr, &buffer[offset], 4);
-		memcpy(&size, &buffer[offset + 4], 4);
-		le32_to_cpus(&addr);
-		le32_to_cpus(&size);
+		addr = get_unaligned_le32(&buffer[offset]);
+		size = get_unaligned_le32(&buffer[offset + 4]);
 		acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 		offset += 8;
 		while (((int)size) && (offset < buffer_size)) {