docs/machines-and-flavours: Document the Smart Panel Blueprint jobs

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

docs/ci/machines-and-flavours.rst

@@ -157,3 +157,23 @@ This job extends `.build-freertos` job from the manifest repository and builds
 32bit ARMv5 micro-controller virtual machine.
 
 The cache for this job is publicly available.
+
+blueprint-smartpanel-zephyr
+...........................
+
+This job extends `.build-zephyr` job from the manifest repository and builds
+the Smart Panel Blueprint - the Zephyr side of it.
+
+.. note::
+    The cache for this job is not public, pending legal review of any firmware
+    that may be included.
+
+blueprint-smartpanel-linux
+..........................
+
+This job extends `.build-linux` job from the manifest repository and builds
+the Smart Panel Blueprint - the Linux side of it.
+
+.. note::
+    The cache for this job is not public, pending legal review of any firmware
+    that may be included.