riscv: Rename Andes PLIC to PLICSW

As PLICSW is used to trigger the software interrupt, we should rename
Andes PLIC configuration and file name to reflect the usage. This patch
also updates PLMT and PLICSW compatible strings to be consistent with
OpenSBI fdt driver.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/arch/riscv/dts/ae350_32.dts b/arch/riscv/dts/ae350_32.dts
index 083f676..96ef8bd 100644
--- a/arch/riscv/dts/ae350_32.dts
+++ b/arch/riscv/dts/ae350_32.dts
@@ -146,8 +146,8 @@
 				&CPU3_intc 11 &CPU3_intc 9>;
 		};
 
-		plic1: interrupt-controller@e6400000 {
-			compatible = "riscv,plic1";
+		plicsw: interrupt-controller@e6400000 {
+			compatible = "andestech,plicsw";
 			#interrupt-cells = <1>;
 			interrupt-controller;
 			reg = <0xe6400000 0x400000>;
@@ -159,7 +159,7 @@
 		};
 
 		plmt0@e6000000 {
-			compatible = "riscv,plmt0";
+			compatible = "andestech,plmt0";
 			interrupts-extended = <&CPU0_intc 7
 				&CPU1_intc 7
 				&CPU2_intc 7