ARM: at91: fix spi cs on sama5d3 Xplained board

The PD16 is the CS3 for SPI0 while not SPI1.
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91-sama5d3_xplained.dts

@@ -34,7 +34,7 @@ slot@0 {
 			};
 
 			spi0: spi@f0004000 {
-				cs-gpios = <&pioD 13 0>;
+				cs-gpios = <&pioD 13 0>, <0>, <0>, <&pioD 16 0>;
 				status = "okay";
 			};
 
@@ -79,7 +79,7 @@ slot@0 {
 			};
 
 			spi1: spi@f8008000 {
-				cs-gpios = <&pioC 25 0>, <0>, <0>, <&pioD 16 0>;
+				cs-gpios = <&pioC 25 0>;
 				status = "okay";
 			};