board: sama5d2_ptc_ek: 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

@@ -151,6 +151,7 @@ config TARGET_SAMA5D2_PTC_EK
 	bool "SAMA5D2 PTC EK board"
 	select BOARD_EARLY_INIT_F
 	select SAMA5D2
+	select BOARD_LATE_INIT
 
 config TARGET_SAMA5D2_XPLAINED
 	bool "SAMA5D2 Xplained board"

board/atmel/sama5d2_ptc_ek/sama5d2_ptc_ek.c

@@ -20,6 +20,8 @@
 #include <asm/arch/sama5d2.h>
 #include <asm/arch/sama5d2_smc.h>
 
+extern void at91_pda_detect(void);
+
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CONFIG_NAND_ATMEL
@@ -65,6 +67,14 @@ static void board_nand_hw_init(void)
 }
 #endif
 
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+	at91_pda_detect();
+	return 0;
+}
+#endif
+
 static void board_usb_hw_init(void)
 {
 	atmel_pio4_set_pio_output(AT91_PIO_PORTB, 12, ATMEL_PIO_PUEN_MASK);