msm: kgsl: Log clk set, enable and prepare failure

Handle the clk API return value so that it’s easy
to catch un clocked GPU register access.

Change-Id: I5a1a9a6cbd673394f126bb17b849393268a22b1b
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>
Signed-off-by: Archana Obannagari <aobann@codeaurora.org>