issue smu cmd to disable all features upon baco entry for arcturus

to mitigate potential dirty I2C controller on boot
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>