msm: sglte2: prevent early bootup of the external qsc modem

The gpio connection to the KPD_PWR_N pin of the external qsc modem
is not inverted as it was in previous sglte targets so configuring
the gpio LOW initially was causing the qsc modem to boot up too
early. Change the configuration to HIGH and set the platform data
flag that tells the mdm driver that this connection is not inverted.

Change-Id: I240f056443aa2eb2fb2bfa192894054b610e91ff
Signed-off-by: Joel King <joelking@codeaurora.org>