defconfig: 8910: Enable all required config to make HSUSB functional

Android gadget driver supports multiple USB functions and uses different
interfaces to support the same.
- CONFIG_SMD for USB RMNET function,
- CONFIG_DIAG_CHAR for USB Diag function,
- CONFIG_NET and CONFIG_NETFILTER for USB RNDIS function,
- CONFIG_SOUND, CONFIG_SND and CONFIG_SND_SOC for USB Audio function,
- CONFIG_UNIX, CONFIG_LEGACY_PTYS for netlink socket and to run adbd,
- CONFIG_USB_GADGET and CONFIG_USB_G_ANDROID for USB Android Gadget
driver,
- CONFIG_USB_GADGET_DEBUG_FILES and CONFIG_USB_GADGET_DEBUG_FS for USB
Gadget debug support,
- CONFIG_USB_CI13XXX_MSM for USB Device Controller driver.

Hence enable all above config to get USB enumeration and (DIAG + ADB)
composition with 8910 simulator.

Change-Id: I4dc0519dd32eae6ea2ad282dbecd27fc0d803536
Signed-off-by: Mayank Rana <mrana@codeaurora.org>