arm64: zynqmp: Remove unused snps,refclk_fladj property

The commit c55ac51a550c ("usb: dwc3: Program GFLADJ") hopefully fixed
issues around fladj logic. This DT property was used in Xilinx stack only
that's why remove because it is not needed anymore.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/9bdbd1156b19e28cdebeca29149268b0579a8b6a.1670855257.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index 34504a8..0a06c73 100644
--- a/arch/arm/dts/zynqmp.dtsi
+++ b/arch/arm/dts/zynqmp.dtsi
@@ -870,7 +870,6 @@
 				interrupts = <0 65 4>, <0 69 4>, <0 75 4>;
 				iommus = <&smmu 0x860>;
 				snps,quirk-frame-length-adjustment = <0x20>;
-				snps,refclk_fladj;
 				clock-names = "ref";
 				snps,enable_guctl1_resume_quirk;
 				snps,enable_guctl1_ipd_quirk;
@@ -902,7 +901,6 @@
 				interrupts = <0 70 4>, <0 74 4>, <0 76 4>;
 				iommus = <&smmu 0x861>;
 				snps,quirk-frame-length-adjustment = <0x20>;
-				snps,refclk_fladj;
 				clock-names = "ref";
 				snps,enable_guctl1_resume_quirk;
 				snps,enable_guctl1_ipd_quirk;