build: Fix up a merge error

In merging a44772c4894 from my work branch I accidentally removed the
part we're we build the module as a module instead of the thing we
previously did. No wonder it didn't build. Apologies.

Change-Id: I207e1f961cd1f1128528cf5121b27bd0b63a2d59
Signed-off-by: Anton Lofgren <alofgren@op5.com>