clk: qcom: Add support for enabling the critical clocks

Add pm_ops thaw_early callback to re-enable the critical clocks
in the thaw path for SA variants.

Change-Id: I43aa8c9e14af69c03b3f192026842b26a149d49f
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>