enable otg host mode, enable pcie usbphy

hc

2024-03-22 cd2737927c6dc09973e8461fc4c9b14e8042cd17

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What:        /sys/class/chromeos/<ec-device-name>/vbc/vboot_context
Date:        October 2015
KernelVersion:    4.4
Description:
        Read/write the verified boot context data included on a
        small nvram space on some EC implementations.