Add striped_loop_restoration experiment

This experiment offset the filter tile grid 8 pixels upwards.
Deblocked pixels (rather than CDEFed pixels) are used for the
2 lines above and below the filter processing unit. The 8 pixel
offset is the offset produced by deblock/cdef. This way the
loop_restoration does not need additional line buffers in a
single pass hardware implementation.

Change-Id: I89e0831dc28413a5d3e02d7a426ce2885ab629d7
diff --git a/configure b/configure
index c59cd2c..a8c5f4f 100755
--- a/configure
+++ b/configure
@@ -276,6 +276,7 @@
     supertx
     ans
     loop_restoration
+    striped_loop_restoration
     ext_partition
     ext_partition_types
     ext_partition_types_ab
@@ -626,6 +627,17 @@
       log_echo "amvr requires hash_me"
       enable_feature hash_me
     fi
+
+    if enabled striped_loop_restoration && ! enabled loop_restoration ; then
+      log_echo "striped_loop_restoration requires loop_restoration"
+      log_echo "enable loop_restoration"
+      enable_feature loop_restoration
+    fi
+    if enabled striped_loop_restoration && enabled frame_superres ; then
+      log_echo "striped_loop_restoration not compatible with frame_superres"
+      log_echo "disabling striped_loop_restoration"
+      disable_feature striped_loop_restoration
+    fi
 }
 
 process_targets() {