dt-bindings: net: snps,dwmac: per channel irq

Add dt-bindings for per channel irq.
Signed-off-by: Rohan G Thomas <rohan.g.thomas@intel.com>
Signed-off-by: Swee Leong Ching <leong.ching.swee@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/snps,dwmac.yaml

@@ -103,17 +103,27 @@ properties:
 
   interrupts:
     minItems: 1
-    items:
-      - description: Combined signal for various interrupt events
-      - description: The interrupt to manage the remote wake-up packet detection
-      - description: The interrupt that occurs when Rx exits the LPI state
+    maxItems: 19
 
   interrupt-names:
     minItems: 1
+    maxItems: 19
     items:
-      - const: macirq
-      - enum: [eth_wake_irq, eth_lpi]
-      - const: eth_lpi
+      oneOf:
+        - description: Combined signal for various interrupt events
+          const: macirq
+        - description: The interrupt to manage the remote wake-up packet detection
+          const: eth_wake_irq
+        - description: The interrupt that occurs when Rx exits the LPI state
+          const: eth_lpi
+        - description: DMA Tx per-channel interrupt
+          pattern: '^dma_tx[0-7]?$'
+        - description: DMA Rx per-channel interrupt
+          pattern: '^dma_rx[0-7]?$'
+
+    allOf:
+      - contains:
+          const: macirq
 
   clocks:
     minItems: 1