msm_11ad: reorder registration with memory dump table

Memory dump table doesn't support de registration, but
when ssr ramdump device creation failed, it frees
the buffer registered with Memory dump table also.

So re-order ramdump device creation to avoid freeing
memory dump table buffer.

Change-Id: I0ac595259159f3d3fe2e5c864dae8a6a1d6b4078
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>