ARM: mstar: Add smp ctrl registers to infinity2m dtsi

Add the smpctrl registers to the infinity2m dtsi so that the
second CPU can be enabled on chips in this family.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Link: https://lore.kernel.org/r/20201201134330.3037007-9-daniel@0x0f.com'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/mstar-infinity2m.dtsi

@@ -13,3 +13,10 @@
 		reg = <0x1>;
 	};
 };
+
+&riu {
+	smpctrl: smpctrl@204000 {
+		reg = <0x204000 0x200>;
+		status = "disabled";
+	};
+};