usb: phy-msm-qusb-v2: Add support to disable high speed chirping

If chirping sequence to detect high speed device fails to complete
device fails to enumerate. Add new call back to disable chirping
by writing 0x20 to QUSB2PHY_SQ_CTRL1 and 0x80 to QUSB2PHY_SQ_CTRL2.
With chirping disabled xhci host can re-enumerate device in full
speed mode.

Change-Id: Icadf4037d6eada63d7585791657db1bc8f6bad48
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>