msm: clock-8974: Add an active-only GPLL0 clock

The clock-krait driver will require an active-only GPLL0
clock to select as a source for the CPU clock(s). Add this
clock.

Change-Id: I7daf4a71343703e31eb0d4534089ebba37755900
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>