eth: eth_mcux: Fix the DT_ prefixed defines

Commit 040d6b6e997 (eth: eth_mcux: Convert to use DT_ prefixed defines)
changed all the defines, but to incorrect ones.

This commit changes them to what actually gets generated.

Signed-off-by: Tomasz Gorochowik <tgorochowik@antmicro.com>
1 file changed