msm: mdm9630: add gpio configuration for sd card detect

SD card detect gpio line needs to be setup with a particular
configuration in order for the card detect interrupt to be
properly received.

CRs-Fixed: 601511
Change-Id: I90b48317e54405001b6534e457f2b0d41bf4b430
Signed-off-by: Krishna Konda <kkonda@codeaurora.org>