defconfig: mdm9630: enable qpnp-usbdetect

Enable the qpnp-usbdetect driver in order to do usb vbus notification
through gpios and mpps instead of the charger chip.

Change-Id: I22dce4e809ce9d37a8b840504d48c27a719f7688
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>