board: atmel: add sama5d2_ptc_ek board

Add the SAMA5D2 PTC EK board and remove the SAMA5D2 PTC ENGI board
which was a prototype.

Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 0d055e3a..9db56f2 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -427,6 +427,9 @@
 	logicpd-torpedo-37xx-devkit.dtb \
 	logicpd-som-lv-37xx-devkit.dtb
 
+dtb-$(CONFIG_TARGET_SAMA5D2_PTC_EK) += \
+	at91-sama5d2_ptc_ek.dtb
+
 dtb-$(CONFIG_TARGET_SAMA5D2_XPLAINED) += \
 	at91-sama5d2_xplained.dtb