atomisp: handle allocation calls before init in the hmm layer

Currently the code handles this in the abstraction above. We want to remove
that abstraction so begin by pushing down the sanity check. Unfortunately
at this point we can't simply fix the init order.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>