board: phytec: Add PHYTEC phyCORE-AM68x/TDA4x SoM

Add support for the PHYTEC phyCORE-AM68x/TDA4x (J721S2 family) SoM.

Supported features:
- 4GB LPDDR4 RAM
- eMMC
- SD-Card
- Ethernet
- OSPI
- AVS
- debug UART

Signed-off-by: Dominik Haller <d.haller@phytec.de>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>

include/configs/phycore_am68x.h

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later OR MIT */
+/*
+ * Configuration header file for PHYTEC phyCORE-AM68x
+ *
+ */
+
+#ifndef __PHYCORE_AM68X_H
+#define __PHYCORE_AM68X_H
+
+/* DDR Configuration */
+#define CFG_SYS_SDRAM_BASE		0x80000000
+
+/* SPL Loader Configuration */
+#if defined(CONFIG_TARGET_PHYCORE_AM68X_A72)
+#define CFG_SYS_UBOOT_BASE              0x50280000
+/* Image load address in RAM for DFU boot*/
+#else
+#define CFG_SYS_UBOOT_BASE              0x50080000
+#endif
+
+#define PHYCORE_AM6XX_FW_NAME_TIBOOT3	u"PHYCORE_AM68X_TIBOOT3"
+#define PHYCORE_AM6XX_FW_NAME_SPL	u"PHYCORE_AM68X_SPL"
+#define PHYCORE_AM6XX_FW_NAME_UBOOT	u"PHYCORE_AM68X_UBOOT"
+
+#endif /* __PHYCORE_AM62AX_H */