fixed m4f memory regions

layers/meta-devdistro/recipes-kernel/linux/files/am62x_enable_m4f.dts

@@ -5,8 +5,43 @@
     compatible = "ti,am625-beagleplay", "ti,am625";
     
     fragment@0 {
+        target-path = "/";
+        __overlay__ {
+            reserved-memory {
+                #address-cells = <2>;
+                #size-cells = <2>;
+
+                mcu_m4fss_dma_memory_region: m4f-dma-memory@9cb00000 {
+                    compatible = "shared-dma-pool";
+                    reg = <0x00 0x9cb00000 0x00 0x00100000>;
+                    no-map;
+                };
+
+                mcu_m4fss_memory_region: m4f-memory@9cc00000 {
+                    compatible = "shared-dma-pool";
+                    reg = <0x00 0x9cc00000 0x00 0x00e00000>;
+                    no-map;
+                };
+            };
+        };
+    };
+
+    fragment@1 {
+        target = <&mailbox0_cluster0>;
+        __overlay__ {
+            mbox_m4_0: mbox-m4-0 {
+                ti,mbox-rx = <0 0 0>;
+                ti,mbox-tx = <1 0 0>;
+            };
+        };
+    };
+
+    fragment@2 {
         target = <&mcu_m4fss>;
         __overlay__ {
+            mboxes = <&mailbox0_cluster0 &mbox_m4_0>;
+	        memory-region = <&mcu_m4fss_dma_memory_region>,
+			                <&mcu_m4fss_memory_region>;
             status = "okay";
         };
     };