ARM: dts: msm: Rename GDSC clock list DT property

We use qcom,clock-names for list of clocks. Upstream API use clock-names
for clk_get DT lookup already. We will later move to DT clock lookup for
GDSC. In order to avoid duplicated clock lists, rename qcom,clock-names
to clock-names.

Change-Id: I7770c270a460098d23f55251c417af374ef1a972
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>