dts: modify model name to Tinker Board (S)

Signed-off-by: pomelo_hsieh <pomelo_hsieh@asus.com>
Change-Id: I166860cc4cfe31aa57c36b95f6ec0e17a6894e51

Author: TsungYu402

arch/arm/boot/dts/rk3288-tinker_board.dts

@@ -44,6 +44,7 @@
 
 / {
 	compatible = "rockchip,rk3288-evb-rk808-linux", "rockchip,rk3288";
+	model = "Tinker Board (S)";
 
 	chosen {
 		bootargs = "console=ttyFIQ0 rw rootfstype=ext4 rootwait";