thermal: tsens: Add TSENS support for msmgold

Update the msm8937 fuse map to accommodate the TSENS
fuse bit allocations for msmgold. Add support to parse per
sensor offsets.

Update the DT document with description of supported optional
properties.

Change-Id: I19a1a6b58e672139fa8c518cd14618122267b350
Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org>