Enable restoration filter for 4:2:2

AWCY results on derf-720p-422 at the default speed show a 28% decrease
in encoding speed:

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-1.4957 | -1.2369 | -0.5441 |  -1.0947 | -0.9361 | -0.7724 |    -2.1054

src/encoder.rs

@@ -244,7 +244,6 @@ impl Sequence {
       enable_superres: false,
       enable_cdef: config.speed_settings.cdef && enable_restoration_filters,
       enable_restoration: config.speed_settings.lrf
-        && config.chroma_sampling != ChromaSampling::Cs422
         && enable_restoration_filters,
       enable_large_lru: true,
       enable_delayed_loopfilter_rdo: true,