ARM: dts: msm: Add the GCC clock controller device for MSM8992

Replace the exisitng dummy GCC clock controller with the real
GCC clock controller device for 8992.

Change-Id: Ifed15c4e43361c79be2d3f90103fe07026a66f9a
Signed-off-by: Pushkar Joshi <pushkarj@codeaurora.org>