drm/radeon/dpm: drop clk/voltage dependency filters for BTC

No longer needed now that the underlying bug was fixed in
e0792981
(drm/radeon/dpm: fix typo in vddci setup for eg/btc).

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=69721



Reviewed-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>