clk: qcom: clk-alpha: Reconfigure Fabia PLL during enable

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

Also update the PLL configuration, calibration and list register
functionalities.

Change-Id: Iad06657b84352915c73c509c5ef04a5f9c528598
Signed-off-by: Taniya Das <tdas@codeaurora.org>