ARM: dts: msm: Use GPIO_85 for IPC on MDM9650 TTP PCIe_EP devices

Use GPIO_85 for MDM2AP status on MDM9650 TTP PCIe_EP
devices instead of GPIO_16 since this is owned by
bluetooth.

Change-Id: I4f954664e3782f0a407b721514f0d4ad1a67d86e
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>