board: Add sam9x60_curiosity support

Add board files, Kconfig, Makefile and MAINTAINERS.

Signed-off-by: Durai Manickam KR <durai.manickamkr@microchip.com>

include/configs/sam9x60_curiosity.h

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Configuration settings for the SAM9X60 CURIOSITY board.
+ *
+ * Copyright (C) 2022 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Durai Manickam KR <durai.manickamkr@microchip.com>
+ */
+
+#ifndef __CONFIG_H__
+#define __CONFIG_H__
+
+#define CONFIG_SYS_AT91_SLOW_CLOCK	32768
+#define CONFIG_SYS_AT91_MAIN_CLOCK	24000000	/* 24 MHz crystal */
+
+#define CONFIG_USART_BASE   ATMEL_BASE_DBGU
+#define CONFIG_USART_ID     0 /* ignored in arm */
+
+/* SDRAM */
+#define CONFIG_SYS_SDRAM_BASE		0x20000000
+#define CONFIG_SYS_SDRAM_SIZE		0x8000000	/* 128 MB */
+
+#ifdef CONFIG_SPL_BUILD
+#define CONFIG_SYS_INIT_SP_ADDR         0x218000
+#else
+#define CONFIG_SYS_INIT_SP_ADDR \
+	(CONFIG_SYS_SDRAM_BASE + 16 * 1024 + CONFIG_SYS_MALLOC_F_LEN - \
+	 GENERATED_GBL_DATA_SIZE)
+#endif
+
+#endif