board: phytec: am64x: Add PHYTEC phyCORE-AM64x SoM

Add support for PHYTEC phyCORE-AM64x SoM.

Supported features:
  - 2GB DDR4 RAM
  - eMMC Flash
  - external uSD
  - OSPI NOR Flash
  - debug UART

Product page SoM: https://www.phytec.com/product/phycore-am64x

Device trees were taken from Linux v6.8-rc2.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
diff --git a/include/configs/phycore_am64x.h b/include/configs/phycore_am64x.h
new file mode 100644
index 0000000..9377db3
--- /dev/null
+++ b/include/configs/phycore_am64x.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Configuration header file for PHYTEC phyCORE-AM64x kit
+ *
+ * Copyright (C) 2022 - 2024 PHYTEC Messtechnik GmbH
+ * Author: Wadim Egorov <w.egorov@phytec.de>
+ */
+
+#ifndef __PHYCORE_AM64X_H
+#define __PHYCORE_AM64X_H
+
+/* DDR Configuration */
+#define CFG_SYS_SDRAM_BASE		0x80000000
+
+#endif /* __PHYCORE_AM64X_H */