msm: krait-regulator: handle efuse differences

Scaling factor version is valid for
- 8974 based devices when the version bits read 1
- 8974pro based devices when the version bits read 1 or 2
- 8084 based devices when the version bits read 0
- 8092 based devices when the version bits read 0

Moreover the three bit scaling factor data for
- 8974 based devices starts at bit 16
- 8974pro based devices starts at bit 16
- 8084 based devices starts at bit 14
- 8092 based devices starts at bit 14

Update the code to handle these differences.

CRs-Fixed: 614657
Change-Id: I30c65026341ece9a03f88514127b563417df46ee
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>