ARM: dts: msm: remove gpio dt entry for configuring mictor on 8610

The CoreSight TPIU driver uses pin control framework to configure
mictor for TPIU trace and falls back on gpio lib if pin control
framework is unavailable. Remove device tree entry for gpio lib
configurations on MSM8610 since pin control support is available
for this chipset.

Change-Id: I5bcec84c0da1a569c50f2aaed664baffbc35b0e9
Signed-off-by: Aparna Das <adas@codeaurora.org>