Fix build warnings like the following:

WARNING: drivers/net/built-in.o(.data+0x12434): Section mismatch in reference from the variable madgemc_driver to the variable .init.data:madgemc_adapter_ids

And add some consts to EISA device ID tables along the way.
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>