clk: msm: clock: Keep the graphics clock peripheral memory always on

Due to an issue with the RBBM perf counter being corrupted after
NAP state, force turn on the gfx3d_clk peripheral memory at probe
and leave it enabled.

CRs-Fixed: 933216
Change-Id: I707b44c56e5e6d3ec9056dded9fe488163be276c
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>