msm: kgsl: Add TCS commands to vote for VRM

This patch adds TCS commands to vote for VRM RPMH resource to put the
PMIC in the right state before high power consuming GPU can start
drawing current from the PMIC. This is part of the sleep and wake
sequence of GPU.

Change-Id: If1a8f2f78a7c373f1288b8acd361f16067415094
Signed-off-by: Sharat Masetty <smasetty@codeaurora.org>