clk: qcom: gpucc: Fix gpll0 parent names

Update the parent names used for gpll0 to match the actual names in the
GCC driver. Without this change, clk_set_rate will fail when the
determine_rate callback fails to find the associated parent.

Change-Id: I0b17fed4e11c30ffb00a2737078bfab5ea1ef523
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>