defconfig: msm: Enable USB host mode configs on MSM8909

Enable configs required for USB host mode support on MSM8909.
Also cleanup unwanted configs like DWC3 and SSUSB and QUSB2 PHY.

Change-Id: I99237791f353e3cb1aad70e5ef1eaa4315227c7a
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>