usb: phy: qmp: configure PCIE_USB3_PHY_FLL_CNTRL2

This change is necessary to ensure that the FLL will operate
correctly across PVT.

CRs-Fixed: 717874
Change-Id: Iaecabd57ffe76141a040542fc186146d870875ec
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>