common: accelgyro: Add read temperature function to driver
common: accelgyro: Add read temperature function to driver

Add the read temperature function to the driver when an FPU
is available.

BUG=b:138303429,chromium:1023858
TEST=None
BRANCH=None

Change-Id: I29e596af202def07c296fa1b478c711d31517999
Signed-off-by: Yuval Peress <50dc11c009bd4d7e9d9d15a383c1743ce5ee82ef@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1859454
Reviewed-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>
Reviewed-by: Gwendal Grignou <190c5a5edfcf62e0246559bf31fa7548674de3ad@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec