drivers: eth_enc424j600: initialize device pointer

Initialize device pointer in driver's context.

It was not done quite right in commit a1708cf2f209
("drivers: ethernet: Fix device instance const qualifier loss"),
and then completely removed in commit 113d9274ea8d
("drivers: ethernet: remove stray expression")'

Signed-off-by: Johann Fischer <j.fischer@phytec.de>
1 file changed