linux-wandboard

nommu: Stub in vm_map_ram()/vm_unmap_ram()/vm_unmap_aliases().

Presently we do not support these interfaces, so make them BUG() wrappers
as per the rest of the vmap interface on nommu. Fixes up the modular xfs
build.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>