clk: qcom: clk-alpha: Reconfigure Trion/Regera PLL during enable

During enable read the L & CAL value to determine if the configuration
is required again, otherwise the PLL would fail to lock or enable due to
lost/missing values.

Change-Id: I605feeba1bb5e0f4a93aad48bb700c6aa59023cd
Signed-off-by: Taniya Das <tdas@codeaurora.org>