clk: qcom: scc-sm6150: Remove enable_safe_config

Remove enable_safe_config for the RCGs because qupv3 RCGs are DFS,
and main_rcg_clk_src is being controlled by ADSP.

Change-Id: If61e2c1864ad52780814712e840350439ae2327f
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>