Fix removal of kmem_cache_name() in 2.6.39
Fix removal of kmem_cache_name() in 2.6.39

The kmem_cache_name() function is removed in kernel 2.6.39. The
kmem_cache structure had a member called 'name' since at least 2.6.27,
so update lisp_mod/tables.c to just use the struct member.

Lluiso/oor,Lluiso/oor,Lluiso/oor,OpenOverlayRouter/oor,OpenOverlayRouter/oor,OpenOverlayRouter/oor,Lluiso/oor,OpenOverlayRouter/oor,OpenOverlayRouter/oor,OpenOverlayRouter/oor,Lluiso/oor,OpenOverlayRouter/oor