arm64: zynqmp: Remove tx_termination_fix detection on silicon v1

Only silicon v1 requires this termination fix. With new nvmem soc
revision nvmem detection driver this can be autodetected at run time and
this flag is not needed.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynqmp.dtsi

@@ -784,7 +784,8 @@
 			      <0x0 0xfd1a0000 0x0 0x1000>,
 			      <0x0 0xff5e0000 0x0 0x1000>;
 			reg-names = "serdes", "siou", "fpd", "lpd";
-			xlnx,tx_termination_fix;
+			nvmem-cells = <&soc_revision>;
+			nvmem-cell-names = "soc_revision";
 			lane0: lane0 {
 				#phy-cells = <4>;
 			};