ARM: dts: dra7: cpsw: fix clocks tree

Current clocks tree definition for CPSW/CPTS doesn't
correspond TRM for dra7/am57 SoCs.

CPTS: has to be sourced from gmac_rft_clk_mux clock
CPSW: DPLL_GMAC -> CLKOUT_M2 -> GMAC_250M_CLK -> 1/2 ->
      -> GMAC_MAIN_CLK (125 MHZ)

Hence, correct clock tree for GMAC_MAIN_CLK and use proper
clock for CPTS. This also require updating of CPTS clock
multiplier.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7.dtsi

@@ -1719,7 +1719,7 @@
 		mac: ethernet@48484000 {
 			compatible = "ti,dra7-cpsw","ti,cpsw";
 			ti,hwmods = "gmac";
-			clocks = <&dpll_gmac_ck>, <&gmac_gmii_ref_clk_div>;
+			clocks = <&gmac_main_clk>, <&gmac_rft_clk_mux>;
 			clock-names = "fck", "cpts";
 			cpdma_channels = <8>;
 			ale_entries = <1024>;
@@ -1728,7 +1728,7 @@
 			mac_control = <0x20>;
 			slaves = <2>;
 			active_slave = <0>;
-			cpts_clock_mult = <0x80000000>;
+			cpts_clock_mult = <0x784CFE14>;
 			cpts_clock_shift = <29>;
 			reg = <0x48484000 0x1000
 			       0x48485200 0x2E00>;

arch/arm/boot/dts/dra7xx-clocks.dtsi

@@ -1003,6 +1003,14 @@
 		ti,index-power-of-two;
 	};
 
+	gmac_main_clk: gmac_main_clk {
+		#clock-cells = <0>;
+		compatible = "fixed-factor-clock";
+		clocks = <&gmac_250m_dclk_div>;
+		clock-mult = <1>;
+		clock-div = <2>;
+	};
+
 	l3init_480m_dclk_div: l3init_480m_dclk_div@1ac {
 		#clock-cells = <0>;
 		compatible = "ti,divider-clock";
@@ -1726,14 +1734,6 @@
 		reg = <0x13d0>;
 	};
 
-	gmac_gmii_ref_clk_div: gmac_gmii_ref_clk_div {
-		#clock-cells = <0>;
-		compatible = "fixed-factor-clock";
-		clocks = <&dpll_gmac_m2_ck>;
-		clock-mult = <1>;
-		clock-div = <2>;
-	};
-
 	gmac_rft_clk_mux: gmac_rft_clk_mux@13d0 {
 		#clock-cells = <0>;
 		compatible = "ti,mux-clock";