toradex: tdx-cfg-block: add new toradex oui range

Add new Toradex MAC OUI (8c:06:cb), to the config block. With this change
we extend the possible serial-numbers as follows:

For serial-numbers 00000000-16777215 OUI 00:14:2d is taken
For serial-numbers 16777216-33554431 OUI 8c:06:cb is taken

Lower 24-bit of the serial number are used in the NIC part of the
MAC address, the complete serial number can be calculated using the OUI.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
diff --git a/board/toradex/common/tdx-cfg-block.h b/board/toradex/common/tdx-cfg-block.h
index 43e662e..1790698 100644
--- a/board/toradex/common/tdx-cfg-block.h
+++ b/board/toradex/common/tdx-cfg-block.h
@@ -114,4 +114,6 @@
 
 int try_migrate_tdx_cfg_block_carrier(void);
 
+void get_mac_from_serial(u32 tdx_serial, struct toradex_eth_addr *eth_addr);
+
 #endif /* _TDX_CFG_BLOCK_H */