board: Add support for Conclusive KSTR-SAMA5D27

Introduce support for Conclusive KSTR-SAMA5D27 Single Board Computer.

Co-developed-by: Jakub Klama <jakub@conclusive.pl>
Signed-off-by: Jakub Klama <jakub@conclusive.pl>
Co-developed-by: Marcin Jabrzyk <marcin@conclusive.pl>
Signed-off-by: Marcin Jabrzyk <marcin@conclusive.pl>
Signed-off-by: Artur Rojek <artur@conclusive.pl>
diff --git a/include/configs/kstr-sama5d27.h b/include/configs/kstr-sama5d27.h
new file mode 100644
index 0000000..772a073
--- /dev/null
+++ b/include/configs/kstr-sama5d27.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2021-2023 Conclusive Engineering Sp. z o. o.
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#include "at91-sama5_common.h"
+
+/* SDRAM */
+#define CFG_SYS_SDRAM_BASE           0x20000000
+#define CFG_SYS_SDRAM_SIZE           0x10000000
+
+#endif