riscv: dts: thead: Introduce reset controller node

T-HEAD TH1520 SoC requires to put the GPU out of the reset state as part
of the power-up sequence.

Link: https://lore.kernel.org/linux-riscv/[email protected]/
Reviewed-by: Drew Fustini <[email protected]>
Signed-off-by: Michal Wilczynski <[email protected]>
[drew: remove hunk that included thead,th1520-reset.h]
Signed-off-by: Drew Fustini <[email protected]>

Author: Michal Wilczynski

arch/riscv/boot/dts/thead/th1520.dtsi

@@ -497,6 +497,12 @@
 			#clock-cells = <1>;
 		};
 
+		rst: reset-controller@ffef528000 {
+			compatible = "thead,th1520-reset";
+			reg = <0xff 0xef528000 0x0 0x4f>;
+			#reset-cells = <1>;
+		};
+
 		dmac0: dma-controller@ffefc00000 {
 			compatible = "snps,axi-dma-1.01a";
 			reg = <0xff 0xefc00000 0x0 0x1000>;