drivers: ethernet: nxp_enet: Fused MAC address handling is wrong

[allemanm]

Describe the bug
Wrong OCOTP fuse addresses are read when composing the MAC adress using fuses.

• Platform: NXP MIMXRT1064
• Issue was introduced in PR drivers: nxp_enet: Add ability to use fused mac on some platforms #73272

[dleach02]

Fixed with #76658