ARM: dts: msm: Set default usb mode as peripheral for msm8909w

Set the default usb mode as peripheral for 8909w + PM660.
Also, set the control to user, so that user can change the
usb mode using sysfs nodes.

Change-Id: Ie8f7ffbbddf6f3956c0c99f26f9fdea6733fd05d
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>