xtensa: update DMA-related Documentation/features entries

xtensa supports DMA API debug and contiguous DMA, mark it as such.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
diff --git a/Documentation/features/io/dma-api-debug/arch-support.txt b/Documentation/features/io/dma-api-debug/arch-support.txt
index 4f4a344..ffa522a 100644
--- a/Documentation/features/io/dma-api-debug/arch-support.txt
+++ b/Documentation/features/io/dma-api-debug/arch-support.txt
@@ -36,5 +36,5 @@
     |          um: | TODO |
     |   unicore32: | TODO |
     |         x86: |  ok  |
-    |      xtensa: | TODO |
+    |      xtensa: |  ok  |
     -----------------------
diff --git a/Documentation/features/io/dma-contiguous/arch-support.txt b/Documentation/features/io/dma-contiguous/arch-support.txt
index a97e8e3..83d2cf9 100644
--- a/Documentation/features/io/dma-contiguous/arch-support.txt
+++ b/Documentation/features/io/dma-contiguous/arch-support.txt
@@ -36,5 +36,5 @@
     |          um: | TODO |
     |   unicore32: | TODO |
     |         x86: |  ok  |
-    |      xtensa: | TODO |
+    |      xtensa: |  ok  |
     -----------------------