RE: [PATCH 3/3][net-next] gianfar: Pack struct gfar_priv_grp into three cachelines

* remove unused members(!): imask, ievent
* move space consuming interrupt name strings (int_name_* members) to
external structures, unessential for the driver's hot path
* keep high priority hot path data within the first 2 cache lines

This reduces struct gfar_priv_grp from 6 to 3 cache lines.

Does it really matter where the message texts are allocated?
Provided they aren't intermixed with the 'hot' data.
Allocating them separately just seems over complicated.

	David