arm64: dts: rockchip: add 'chassis-type' property

A new 'chassis-type' root node property has recently been approved for
the device-tree specification, in order to provide a simple way for
userspace to detect the device form factor and adjust their behavior
accordingly.

This patch fills in this property for end-user devices (such as laptops,
smartphones and tablets) based on Rockchip ARM64 processors.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Link: https://lore.kernel.org/r/20211016102025.23346-5-arnaud.ferraris@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-gru-bob.dts

@@ -16,6 +16,7 @@
 		     "google,bob-rev7", "google,bob-rev6",
 		     "google,bob-rev5", "google,bob-rev4",
 		     "google,bob", "google,gru", "rockchip,rk3399";
+	chassis-type = "convertible";
 
 	edp_panel: edp-panel {
 		compatible = "boe,nv101wxmn51";

arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts

@@ -24,6 +24,7 @@
 		     "google,kevin-rev9", "google,kevin-rev8",
 		     "google,kevin-rev7", "google,kevin-rev6",
 		     "google,kevin", "google,gru", "rockchip,rk3399";
+	chassis-type = "convertible";
 
 	/* Power tree */
 

arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi

@@ -8,6 +8,8 @@
 #include "rk3399-gru.dtsi"
 
 /{
+	chassis-type = "tablet";
+
 	/* Power tree */
 
 	/* ppvar_sys children, sorted by name */

arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts

@@ -17,6 +17,7 @@
 / {
 	model = "Pine64 Pinebook Pro";
 	compatible = "pine64,pinebook-pro", "rockchip,rk3399";
+	chassis-type = "laptop";
 
 	aliases {
 		mmc0 = &sdio0;