Add t6cal console command to set/print TMP006 calibration
Add t6cal console command to set/print TMP006 calibration

Note that radix must be specified as an integer, because we don't have
floating-point parsing.  So to set the first sensor's S0 to 3.600e-14,
do:
   t6cal 0 S0 3600

BUG=chrome-os-partner:14955
BRANCH=link
TEST=manual

From EC console,
  t6cal 0 s0 3500
  t6cal 1 b0 -3000
  t6cal 1 b1 -5600
  t6cal 2 b2 4700
  t6cal
The final t6cal should show the changes from the previous commands

Change-Id: I2f8f71890e8e64a427cc29c3ef86ca991ce6b039
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/35204

alterapraxisptyltd/chromium-ec,fourier49/BZ_DEV_EC,longsleep/ec,longsleep/ec,gelraen/cros-ec,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,fourier49/BIZ_EC,eatbyte/chromium-ec,fourier49/BIZ_EC,md5555/ec,gelraen/cros-ec,eatbyte/chromium-ec,fourier49/BZ_DEV_EC,md5555/ec,fourier49/BZ_DEV_EC,eatbyte/chromium-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,thehobn/ec,alterapraxisptyltd/chromium-ec,md5555/ec,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,coreboot/chrome-ec,alterapraxisptyltd/chromium-ec,gelraen/cros-ec,longsleep/ec,coreboot/chrome-ec,thehobn/ec,mtk09422/chromiumos-platform-ec,alterapraxisptyltd/chromium-ec,thehobn/ec,thehobn/ec,mtk09422/chromiumos-platform-ec,coreboot/chrome-ec,md5555/ec,gelraen/cros-ec,longsleep/ec,coreboot/chrome-ec,fourier49/BZ_DEV_EC,fourier49/BIZ_EC,mtk09422/chromiumos-platform-ec,mtk09422/chromiumos-platform-ec,eatbyte/chromium-ec,fourier49/BIZ_EC,akappy7/ChromeOS_EC_LED_Diagnostics