usb: phy-msm-ssusb-qmp: Improve msm_ssphy_qmp_powerup API

Workaround implemneted by commit <8182accd> ("usb: dwc3:
Powerdown the SS PHY while connected to HS device") needs to
be applied and removed when PHY_WAKEUP_WA_EN flag is set.
This allows the API call to become no-op if workaround is
not required in case super speed port is enabled.

Change-Id: I5e4784a1b5af72f6d85d0c6e94ebc717807c655d
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>