mcu/stm32h7: Fix core dump configuration

When BSP switched to use autogenerated linker script
definitions for _dtcmram_start and _itcmram_start
were not present in generated script.

Now STM32H7 MCU adds user_sections.ld.h that provides
missing symbols.

Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>

hw/mcu/stm/stm32h7xx/link/include/user_sections.ld.h

@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+    _dtcmram_start = ORIGIN(DTCM);
+    _dtcmram_limit = ORIGIN(DTCM) + LENGTH(DTCM);
+    _itcmram_start = ORIGIN(ITCM);
+    _itcmram_limit = ORIGIN(ITCM) + LENGTH(ITCM);