ARM: dts: set 'ti,set-rate-parent' for dpll4_m4 path

Set 'ti,set-rate-parent' property for clocks in the dpll4_m4 clock
path, which is used for DSS functional clock. This fixes DSS driver's
clock rate configuration, which needs the rate to be propagated properly
to the divider node (dpll4_m4_ck).
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Christoph Fritz <chf.fritz@googlemail.com>
Tested-by: Marek Belisko <marek@goldelico.com>
Acked-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3xxx-clocks.dtsi

@@ -429,6 +429,7 @@ dpll4_m4x2_mul_ck: dpll4_m4x2_mul_ck {
 		clocks = <&dpll4_m4_ck>;
 		ti,clock-mult = <2>;
 		ti,clock-div = <1>;
+		ti,set-rate-parent;
 	};
 
 	dpll4_m4x2_ck: dpll4_m4x2_ck {
@@ -438,6 +439,7 @@ dpll4_m4x2_ck: dpll4_m4x2_ck {
 		ti,bit-shift = <0x1d>;
 		reg = <0x0d00>;
 		ti,set-bit-to-disable;
+		ti,set-rate-parent;
 	};
 
 	dpll4_m5_ck: dpll4_m5_ck {