regulator: cpr3-regulator: Add support for sdm660

Add speed-bin 4 and 3 support for SDM660. Update temp based
adjustments config. Includes change to use scaled gate count
for aging measurements and use default step_quot during corner
switch.

Change-Id: Ie2bd2ad64915a75b7cabd31b3c2ea35b20967cc4
Signed-off-by: Asha Magadi Venkateshamurthy <amagad@codeaurora.org>