ARM: dts: msm: Update GPUCC clock controller for SDM855

Update the compatible string of the GPU clock controller
device and specify other required properties so that
consumers can physically affect the state of GPU clocks.

CRs-Fixed: 2179756
Change-Id: I4e60683d3d460e998bc469c912401d0c897b7a45
Signed-off-by: Vicky Wallace <vwallace@codeaurora.org>