Revert "clk: qcom: Add support for enabling the critical clocks"

The critical clocks in the each clock controller are in enable
state in the thaw process, so we don't require thaw callback.
This reverts commit 70266ab9.

Change-Id: Ia1fe84ff1902a16eefa65c7464118264426b967a
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>