clk: qcom: update the DisplayPort clocks

Update the frequencies of the clocks from Hz to KHz so that they
match the frequencies requested by the DisplayPort driver. This
ensures that the clock framework correctly scales parent clock
values for all DisplayPort clock requests.

Change-Id: I46be984340902f1facba59ad966e0f2ad1b1b006
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>