tf-a-eclair-daily: Throttle by "eclair-daily" category

Intended to be 3 or 4 concurrent builds (to not just surpass license
limit, but be less than that, to not interfere with patch builds).

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I696b1a7efde1a106cf0fcc4bb72efad78f32ece5
diff --git a/tf-a-eclair-daily.yaml b/tf-a-eclair-daily.yaml
index 36f776f..c4b69ba 100644
--- a/tf-a-eclair-daily.yaml
+++ b/tf-a-eclair-daily.yaml
@@ -11,6 +11,11 @@
             days-to-keep: 45
         - authorization:
             !include: authorization.yaml.inc
+        - throttle:
+            option: category
+            categories: [eclair-daily]
+            matrix-builds: false
+            matrix-configs: true
     parameters:
         - string:
             name: MAKE_TARGET