added poll api passthrough

modules/uart-interrupt-poll-bridge/dts/bindings/interrupt-poll-bridge.yaml

@@ -0,0 +1,17 @@
+description: Uart interrupt driven api for poll only devices via timer instead of busy cpu time
+
+compatible: "uart-interrupt-poll-bridge"
+
+properties:
+  interrupt-parent:
+    type: phandle
+    required: true
+  interrupts:
+    type: array
+    required: true
+  timer:
+    type: phandle
+    required: true
+  uart:
+    type: phandle
+    required: true