dts: arm: silabs: fix interrupt level for acmp0 on xg21

Fix interrupt level for acmp0 in the dts for xg21 device.
Only radio interrupts are critical and should have priority 0.

Signed-off-by: Bastien Beauchamp <bastien.beauchamp@silabs.com>

Author: silabs-BastienB

dts/arm/silabs/xg21/xg21.dtsi

@@ -441,7 +441,7 @@
 		acmp0: acmp@5a008000 {
 			compatible = "silabs,acmp";
 			reg = <0x5a008000 0x4000>;
-			interrupts = <41 0>;
+			interrupts = <41 2>;
 			clocks = <&cmu CLOCK_AUTO CLOCK_BRANCH_EM01GRPACLK>;
 			status = "disabled";
 		};