drm/amdgpu/mmhub3.0: add bounds checking for cid

drm/amdgpu/mmhub3.0: add bounds checking for cid

commit cdb82ecbeccb55fae75a3c956b605f7801a30db1 upstream.

The value should never exceed the array size as those
are the only values the hardware is expected to return,
but add checks anyway.

Reviewed-by: Benjamin Cheng <benjamin.cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit f14f27bbe2a3ed7af32d5f6eaf3f417139f45253)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>