drivers: thermal: bcl_pmic5: Add snapshot of bcl driver

This is a snapshot of the bcl driver from ms-4.19 to msm-5.4 as of
'commit <dfe3da00b56a86849ec49e085ea5a57d3fa7636f> (drivers: thermal:
bcl_pmic5: filter out BCL spurious interrupts)'.

Modify vbat to register directly as a sensor bypassing the of-thermal.
This will enable vbat sensor to read trip thresholds directly from
the peripheral.

Change-Id: I5bf07e05ac47f68d16fc40e859b16a1ce549ee5d
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>