Correct the Vega10 thermal swctf limit.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1267Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>