ARM: meson: Sync Amlogic DT from Linux 5.14

Import Amlogic DT changes from Linux commit 7d2a07b76933 ("Linux 5.14"),
dt-bindings clock changes and new meson-g12b-gsking-x.dts,
meson-sm1-bananapi-m5 & odroid-hc4 boards.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/arch/arm/dts/meson-g12b.dtsi b/arch/arm/dts/meson-g12b.dtsi
index 9b8548e..ee8fcae 100644
--- a/arch/arm/dts/meson-g12b.dtsi
+++ b/arch/arm/dts/meson-g12b.dtsi
@@ -135,3 +135,7 @@
 		};
 	};
 };
+
+&mali {
+	dma-coherent;
+};