ARM: dts: msm: set gpio98/gpio99 as input in suspend for msm8937

On msm8937 gpio98/gpio99 is kept as output pull down during
suspend, which increases rock bottom current. Change their
states to input pull down to reduce power consumption.

Change-Id: I182789ad3323bd4fdd5e8646f078a8028abf6bc3
Signed-off-by: Ray Zhang <rayz@codeaurora.org>