arm: dts: k3-j7200-common-proc-board-u-boot: Add u-boot tags for torrent serdes

Add u-boot tags for torrent serdes. This has properties specific to
u-boot on top of DT in v5.13 Linux Kernel.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20210721155849.20994-15-kishon@ti.com

arch/arm/dts/k3-j7200-common-proc-board-u-boot.dtsi

@@ -188,3 +188,15 @@
 &hbmc_mux {
 	u-boot,dm-spl;
 };
+
+&serdes_ln_ctrl {
+	u-boot,mux-autoprobe;
+};
+
+&usb_serdes_mux {
+	u-boot,mux-autoprobe;
+};
+
+&serdes0 {
+	u-boot,dm-spl;
+};