kms_content_protection: test content type change

Testing the content type change when the content protection already
enabled.

v2:
  Rebased.
v3:
  Type 0 -> Type 1 is included.
  Type check is removed [Uma]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/315468/?series=57756&rev=10