dts/bindings: Add optionnal dmas and dma-names to base.yaml

dmas and dma-names properties could be used by a wide range
of potential dma client, hence put them in base.yaml, as
optional properties.
Since current stm32-i2s driver implementation only support
dma, set these properties as required.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

dts/bindings/base/base.yaml

@@ -70,3 +70,13 @@ properties:
         type: int
         required: false
         description: number of size cells in reg property
+
+    dmas:
+      required: false
+      type: phandle-array
+      description: DMA channels specifiers
+
+    dma-names:
+      required: false
+      type: string-array
+      description: Provided names of DMA channel specifiers

dts/bindings/dma/dma.yaml

@@ -1,16 +0,0 @@
-# Copyright (c) 2019, Linaro Limited
-# Copyright (c) 2019, Song Qiang <songqiang1304521@gmail.com>
-# SPDX-License-Identifier: Apache-2.0
-
-# Common fields for DMA users
-
-properties:
-    dmas:
-      required: true
-      type: phandle-array
-      description: DMA instances information
-
-    dma-names:
-      required: false
-      type: string-array
-      description: name of each dma instance

dts/bindings/i2s/st,stm32-i2s.yaml

@@ -5,7 +5,7 @@ description: STM32 I2S controller
 
 compatible: "st,stm32-i2s"
 
-include: [i2s-controller.yaml, dma.yaml]
+include: [i2s-controller.yaml]
 
 properties:
     reg:
@@ -14,5 +14,8 @@ properties:
     interrupts:
       required: true
 
+    dmas:
+      required: true
+
     dma-names:
       required: true