clk: qcom: Add the CRITICAL flag to multimedia XO and GDSC clocks

The multimedia XO and GDSC clocks are required to be enabled
for the relevant GDSCs to turn on. Keep an always-on vote on
these clocks so that the dependency is met. The state of these
clocks will then toggle based on the MMCX rail state.

Change-Id: Ica61cb587ea943d569f461ce7d3e979b163c85db
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>