ARM: dts: Fix wrong mdio clock for dm814x

Recent PTP-specific cpsw driver changes started exposing an issue on at at least j5eco-evm:

Unhandled fault: external abort on non-linefetch (0x1008) at 0xf0169004
...
(davinci_mdio_runtime_suspend) from [<c063f2a4>] (__rpm_callback+0x84/0x154) (__rpm_callback) from [<c063f394>] (rpm_callback+0x20/0x80) (rpm_callback) from [<c063f4f0>] (rpm_suspend+0xfc/0x6ac) (rpm_suspend) from [<c0640af0>] (pm_runtime_work+0x88/0xa4) (pm_runtime_work) from [<c0155338>] (process_one_work+0x228/0x568)
...

Let's fix the issue by using the correct the mdio clock as suggested by Grygorii Strashko <[email protected]>.

The DM814_ETHERNET_CPGMAC0_CLKCTRL clock is the interconnect target module clock and managed by ti-sysc.

---
 arch/arm/boot/dts/dm814x.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -693,7 +693,7 @@ mac: ethernet@0 {
 
 					davinci_mdio: mdio@800 {
 						compatible = "ti,cpsw-mdio", "ti,davinci_mdio";
-						clocks = <&alwon_ethernet_clkctrl DM814_ETHERNET_CPGMAC0_CLKCTRL 0>;
+						clocks = <&cpsw_125mhz_gclk>;
 						clock-names = "fck";
 						#address-cells = <1>;
 						#size-cells = <0>;

2.26.2