ARM: dts: iwg20d-q7-common: Move pciec node out of common dtsi

PCIe is not populated by default on iWave RZ/G1N board. RZ/G1N board
is almost identical to RZ/G1M. In order to reuse the common dtsi for
both the boards, it is required to move pcie node from common dtsi
to board specific dts.

Signed-off-by: Biju Das <[e-mail]>
Reviewed-by: Fabrizio Castro <[e-mail]>
Signed-off-by: Simon Horman <[e-mail]>

arch/arm/boot/dts/iwg20d-q7-common.dtsi

···
 	clock-frequency = <100000000>;
 };
 
-&pciec {
-	status = "okay";
-};
-
 &pfc {
 	can0_pins: can0 {
 		groups = "can0_data_d";

arch/arm/boot/dts/r8a7743-iwg20d-q7-dbcm-ca.dts

···
 	model = "iW-RainboW-G20D-Q7 RZ/G1M based plus camera daughter board";
 	compatible = "iwave,g20d", "iwave,g20m", "renesas,r8a7743";
 };
+
+&pciec {
+	status = "okay";
+};

arch/arm/boot/dts/r8a7743-iwg20d-q7.dts

···
 	model = "iWave Systems RainboW-G20D-Qseven board based on RZ/G1M";
 	compatible = "iwave,g20d", "iwave,g20m", "renesas,r8a7743";
 };
+
+&pciec {
+	status = "okay";
+};