bluetooth: host: Avoid warning for unaligned access

Rewrote places in the bluetooth code that converts objects
larger than one byte by taking the address of an unaligned struct
member and changed it to a function that takes the value directly
and converts it to big endian.

Signed-off-by: Lars-Ove Karlsson <lars-ove.karlsson@iar.com>

Author: LoveKarlsson

subsys/bluetooth/host/classic/a2dp.c

@@ -282,8 +282,8 @@ static void bt_a2dp_media_data_callback(struct bt_avdtp_sep *sep, struct net_buf
 	stream = ep->stream;
 	media_hdr = net_buf_pull_mem(buf, sizeof(*media_hdr));
 
-	stream->ops->recv(stream, buf, sys_get_be16((uint8_t *)&media_hdr->sequence_number),
-			  sys_get_be32((uint8_t *)&media_hdr->time_stamp));
+	stream->ops->recv(stream, buf, sys_be16_to_cpu(media_hdr->sequence_number),
+			  sys_be32_to_cpu(media_hdr->time_stamp));
 }
 #endif