clk: qcom: gcc: Update source for gmu and mdss_ahb clk on TRINKET

Update the gmu clock source from gpll0_out_main to
gcc_gpu_gpll0_clk_src in gpucc for Trinket. Also update the
mdss_ahb clk source from gpll0_out_main to
gcc_disp_gpll0_div_clk_src.

Change-Id: Iad8ecaff58c8842cb64ce05f225b5b4418002a37
Signed-off-by: Diptanshu Jamgade <djamgade@codeaurora.org>