By separating the JPEG power feature, and using its
own PowerUp and PowerDown messages

v2: remove PowerUpJpeg message argument
Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>