ARM: dts: msm: Adjust Squelch Repeater Register on SUN mtp platform

Update the TUNE_USB2_SQUELCH_U register (0xFD54) to a value of 0x4 in
the MTP platform’s override sequence. This adjustment addresses the
current issue of excessive RX sensitivity, which causes the device to
misinterpret noise as valid high-speed USB signals, leading to frequent
USB disconnections.

By increasing the squelch level, we enhance the precision of USB signal
detection, reducing false positives and improving overall USB stability.

Change-Id: Ifcd680e3c95170d168f693b4a6fd63aefe6c41d6
Signed-off-by: Udipto Goswami <quic_ugoswami@quicinc.com>

qcom/sun-mtp.dtsi

@@ -290,6 +290,8 @@
 		/* <value reg_offset> */
 		/* Adjust HS trasmit amplitude */
 		<0xa 0x51
+		/* Squelch detection threshold */
+		 0x4 0x54
 		/* Tx pre-emphasis tuning */
 		 0x3 0x57>;
 };