ARM: dts: use ti,fixed-factor-clock for dpll4_m4x2_mul_ck

We need to use set-rate-parent for dpll4_m4 clock path, so use the
ti,fixed-factor-clock version which supports set-rate-parent property.

The set-rate-parent flag itself is set in the following patch, this one
just changes the clock driver to ti,fixed-factor-clock without any other
changes.
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/omap36xx-clocks.dtsi

@@ -79,7 +79,7 @@ &dpll4_m3x2_mul_ck {
 };
 
 &dpll4_m4x2_mul_ck {
-	clock-mult = <1>;
+	ti,clock-mult = <1>;
 };
 
 &dpll4_m5x2_mul_ck {

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

@@ -425,10 +425,10 @@ dpll4_m4_ck: dpll4_m4_ck {
 
 	dpll4_m4x2_mul_ck: dpll4_m4x2_mul_ck {
 		#clock-cells = <0>;
-		compatible = "fixed-factor-clock";
+		compatible = "ti,fixed-factor-clock";
 		clocks = <&dpll4_m4_ck>;
-		clock-mult = <2>;
-		clock-div = <1>;
+		ti,clock-mult = <2>;
+		ti,clock-div = <1>;
 	};
 
 	dpll4_m4x2_ck: dpll4_m4x2_ck {