arm/xilinx-zynqmp-rpu: Add section for the OCM

spec/build/bsps/arm/xilinx-zynqmp-rpu/linkcmds.yml

@@ -25,6 +25,17 @@ content: |
 
   bsp_vector_table_in_start_section = 1;
 
+  /*
+   * Please note that the OCM may be also used by bootloaders or the
+   * ARM Trusted Firmware (ATF).  You have to make sure that the OCM is shared
+   * without conflicts.
+   */
+  SECTIONS {
+    .ocm : {
+      *(SORT(.ocm*));
+    } > OCM AT > OCM
+  }
+
   INCLUDE linkcmds.armv4
 copyrights:
 - Copyright (C) 2024 embedded brains GmbH & Co. KG