ARM: dts: msm: update cd gpio of SD card for SDA845 V2 HDK

The SD card detecion gpio on SDA845 V2 HDK is
supposed to be active low but not active high,
this change updates it.

Change-Id: I34e03db80b60de6ec4049d09bfeeb7aa0459832d
Signed-off-by: Can Guo <cang@codeaurora.org>