arm64: dts: meson-axg: fix mailbox address

MHU mailbox address is wrong. Fixing it enables the mailboxes on the A113.
These mailboxes are needed for SCPI

Fixes: 9d59b708 ("arm64: dts: meson-axg: add initial A113D SoC DT support")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg.dtsi

@@ -979,9 +979,9 @@ clkc: clock-controller {
 			};
 		};
 
-		mailbox: mailbox@ff63dc00 {
+		mailbox: mailbox@ff63c404 {
 			compatible = "amlogic,meson-gx-mhu", "amlogic,meson-gxbb-mhu";
-			reg = <0 0xff63dc00 0 0x400>;
+			reg = <0 0xff63c404 0 0x4c>;
 			interrupts = <GIC_SPI 208 IRQ_TYPE_EDGE_RISING>,
 				     <GIC_SPI 209 IRQ_TYPE_EDGE_RISING>,
 				     <GIC_SPI 210 IRQ_TYPE_EDGE_RISING>;