Chipidea USB PHY tuning

0x82: PARAMETER_OVERRIDE_C

bit 6:0 -- for decreasing rise/fall time and raising pre-emphysis
// /sys/module/phy_msm_usb/parameters/override_phy_init
// format
// <val addr ... val addr 0xffffffff>;
&usb_otg {
         ...
        qcom,hsusb-otg-phy-init-seq =
        <0x44 0x80 0x68 0x81 0xXX 0x82 0x13 0x83 0xffffffff>;
};