defconfig: sdxpoorwills: Removing unwanted configs from sdxpoorwills

Few FS, BT, HID and USB_MASS STORAGE configurations are not required
on auto platform.

In NAND based memory, UBIFS is used so, EXT3 FILESYSTEM Config is removed.
Synergy BT is used in all auto images.
USB Host Mode Storage is not supported.

Change-Id: I9d342fceeef6b45ea213479a9f6da2e8be72679c
Signed-off-by: Sanjay Dwivedi <sanjaykd@codeaurora.org>