ethtool_features?

Hum.  Instead of adding all these _get_foo ops to test dev->features bits, would anyone mind if I created a single _get_features() ethtool sub-ioctl?

Given the current ethtool_ops code, its implementation would in fact be completely transparent to low-level drivers.  It need only be implemented in net/core/ethtool.c, without even adding a new hook.

	Jeff