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>
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 3784cbb..a6329dc 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -151,6 +151,7 @@
 	bool "SAMA5D2 PTC EK board"
 	select BOARD_EARLY_INIT_F
 	select SAMA5D2
+	select BOARD_LATE_INIT
 
 config TARGET_SAMA5D2_XPLAINED
 	bool "SAMA5D2 Xplained board"