msm: camera: ife: Get last CDM done under internal command

Get last CDM done is an internal command, moved to
correct switch case.

CRs-Fixed: 2939681
Change-Id: I72f72864bd52012e15a6bdbde279c9990aee405c
Signed-off-by: Tejas Prajapati <tpraja@codeaurora.org>