Zephyr core bacnet server port; bacnet/device test (#123)

Co-authored-by: Gregory Shue <gregory.shue@legrand.us>

src/bacnet/bacdef.h

@@ -138,7 +138,13 @@ typedef uint32_t BACNET_ARRAY_INDEX;
    equal to 7 bytes.  The IPv6 addresses are planned to be handled
    outside this area. */
 /* FIXME: mac[] only needs to be as big as our local datalink MAC */
-#define MAX_MAC_LEN 7
+
+#if BACDL_BIP6
+    #define MAX_MAC_LEN 19
+#else
+    #define MAX_MAC_LEN 7
+#endif
+
 struct BACnet_Device_Address {
     /* mac_len = 0 is a broadcast address */
     uint8_t mac_len;

src/bacnet/basic/bbmd/h_bbmd.c

@@ -167,7 +167,8 @@ static void debug_print_string(const char *str)
  * BBMD_BACKUP_FILE should be set to the file name
  * in which to store the BDT.
  */
-#ifndef BBMD_BACKUP_FILE
+#if defined(BBMD_BACKUP_FILE) && (BBMD_BACKUP_FILE == 1)
+#undef BBMD_BACKUP_FILE
 #define BBMD_BACKUP_FILE BACnet_BDT_table
 #endif
 #if defined(BBMD_BACKUP_FILE)