arm/dt: 9625: Enable SDC3 initialization by default

WLAN solutions for msm9625 now use SDIO as the
primary interface. Allow initialization without
having to edit the device tree.

Change-Id: If130831d31499e03f5d57a45cef72c800151817d
Signed-off-by: Oluwafemi Adeyemi <aadeyemi@codeaurora.org>