clk: qcom: Reconfigure Fabia PLL during set_rate

During set_rate read the L and CAL_L_VAL to determine
if the configuration is required again, otherwise the
PLL would fail to lock or enable due to lost/missing
values.
Also, add support to configure the default CAL_L_VAL
in PLL configuration.

Change-Id: Idad51fcd5fc24c2dff33d023c35f2658e414e6bd
Signed-off-by: Diptanshu Jamgade <djamgade@codeaurora.org>