soc: qcom: dcc_v2: Fix dcc clock

DCC clock is deferred to check the availability
of the clock and then enable them. And add the
support to disable the clock after use.

Change-Id: I20937825ba3213ddc7b1c28ce63b6c1544257b81
Signed-off-by: Saranya Chidura <schidura@codeaurora.org>