dts: arm: gigadevice: organize dts files in folders

Create a folder for each of the series.

Signed-off-by: Gerard Marull-Paretas <[email protected]>

Author: gmarull

boards/arm/gd32f403z_eval/gd32f403z_eval.dts

@@ -5,7 +5,7 @@
 
 /dts-v1/;
 
-#include <gigadevice/gd32f403zet6.dtsi>
+#include <gigadevice/gd32f403/gd32f403zet6.dtsi>
 
 / {
 	model = "GigaDevice GD32F403Z Evaluation Kit";

dts/arm/gigadevice/gd32f403.dtsi renamed to dts/arm/gigadevice/gd32f403/gd32f403.dtsi

@@ -5,7 +5,7 @@
  */
 
 #include <mem.h>
-#include <gigadevice/gd32f403.dtsi>
+#include <gigadevice/gd32f403/gd32f403.dtsi>
 
 / {
 	soc {