Add a new sysfs node to communicate available GPU clock frequencies to userspace for the power daemons. Change-Id: I2479217aa797e2066cc50476ef7f73c5cae8aebe Signed-off-by: Anshuman Dani <adani@codeaurora.org> Signed-off-by: Rajeev Kulkarni <krajeev@codeaurora.org>