drm/amdgpu/mmhub3.0.1: add bounds checking for cid

drm/amdgpu/mmhub3.0.1: add bounds checking for cid

commit 5d4e88bcfef29569a1db224ef15e28c603666c6d 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 5f76083183363c4528a4aaa593f5d38c28fe7d7b)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>