clk: qcom: gcc-scuba: Add gcc_pwm0_xo512_div_clk_src clk support

Add gcc_pwm0_xo512_div_clk_src as parent of gcc_pwm0_xo512_clk
to support the pdm_pwm functionality.

Change-Id: Ida37f2a833881640c1d31d6d723ecbe715b701a0
Signed-off-by: Anaadi Mishra <quic_anaadim@quicinc.com>