Add Exit Air Temp Limit Support

Exit air temp in BIOS is set using the TControl command.
Implement enough of this command to get Exit air temp
limit to work correctly in BIOS. BIOS hard codes the
legacy sensor number to 0x2e, so we will probably want
to have them fix this at some point in the future.

Tested: Changed clamp values through bios and they were
the same on next read.

Change-Id: I17e1f9771d3b7806a9ea1e3db30c2d5a7b2cab6a
Signed-off-by: James Feist <james.feist@linux.intel.com>
2 files changed