board: sama5d3_xplained: add pda detect call at init time

Call the PDA detection mechanism at boot time so we can have
the pda environment variable ready for use.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>

arch/arm/mach-at91/Kconfig

@@ -177,6 +177,7 @@ config TARGET_SAMA5D3_XPLAINED
 	select BOARD_EARLY_INIT_F
 	select SAMA5D3
 	select SUPPORT_SPL
+	select BOARD_LATE_INIT
 
 config TARGET_SAMA5D3XEK
 	bool "SAMA5D3X-EK board"

board/atmel/sama5d3_xplained/sama5d3_xplained.c

@@ -18,6 +18,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+extern void at91_pda_detect(void);
+
 #ifdef CONFIG_NAND_ATMEL
 void sama5d3_xplained_nand_hw_init(void)
 {
@@ -72,6 +74,14 @@ void board_debug_uart_init(void)
 }
 #endif
 
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+	at91_pda_detect();
+	return 0;
+}
+#endif
+
 #ifdef CONFIG_BOARD_EARLY_INIT_F
 int board_early_init_f(void)
 {