aw_syscon: Add a new compatible

Since 5.0 DTS the syscon controller have a new compatible as it
exports new subnodes, we currently only use it as a syscon provider
so just add the new compatible.

Tested On:  H3
MFC after:	1 month

sys/arm/allwinner/aw_syscon.c

@@ -52,6 +52,7 @@ static struct ofw_compat_data compat_data[] = {
 	{"allwinner,sun50i-a64-system-control", 1},
 	{"allwinner,sun8i-a83t-system-controller", 1},
 	{"allwinner,sun8i-h3-system-controller", 1},
+	{"allwinner,sun8i-h3-system-control", 1},
 	{NULL,             0}
 };