ARM: mstar: Wire up smpctrl for SSD201/SSD202D

Add the specific compat string for the smpctrl registers to the
SSD201/SSD202D common dtsi.

Signed-off-by: Daniel Palmer <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]'
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm/boot/dts/mstar-infinity2m-ssd20xd.dtsi

···
  */
 
 #include "mstar-infinity2m.dtsi"
+
+&smpctrl {
+	compatible = "sstar,ssd201-smpctrl", "mstar,smpctrl";
+	status = "okay";
+};