arm: dts: aspeed: Add vuart aspeed,sirq-polarity-sense to aspeed-g5.dtsi

Enable auto-configuration of VUART SIRQ polarity on AST2500.
Signed-off-by: Oskar Senft <osk@google.com>
Link: https://lore.kernel.org/r/20190905144130.220713-3-osk@google.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/boot/dts/aspeed-g5.dtsi

@@ -379,6 +379,7 @@ vuart: serial@1e787000 {
 				interrupts = <8>;
 				clocks = <&syscon ASPEED_CLK_APB>;
 				no-loopback-test;
+				aspeed,sirq-polarity-sense = <&syscon 0x70 25>;
 				status = "disabled";
 			};