ARM: dts: msm: remove gpio dt entry for configuring mictor on 8084

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 APQ8084 since pin control support is available
for this chipset.

Change-Id: I1b036c4e080a333ed7996610940741c00e846190
Signed-off-by: Aparna Das <adas@codeaurora.org>