dt-bindings: arm: coresight: Add proxy-regs and proxy-clks

Add qcom,proxy-regs and qcom,proxy-clks for coresight components
to vote clocks and regulators when access the components'
registers.

Change-Id: I523d26c2f57db29355a1f645d5b193d183eaffc3
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>