u-boot: Add OWNERS file

This CL is populating OWNERS file based on the candidates in the Chrome OS OWNERS status sheet.

BUG=b:132095048
TEST=None

Change-Id: Ibb6fb7a3243e89f0a556dd09388b030f6d56e833
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/u-boot/+/1682506
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..811e86c
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,2 @@
+sjg@chromium.org
+bhthompson@chromium.org