power: supply: ltc2941-battery-gauge: Fix temperature units

[ Upstream commit dde5953f05a89eb63a0d666ffe51d447b2ac3e05 ]

Temperature is measured in tenths of degree Celsius.

Fixes: 085bc24d ("Add LTC2941/LTC2943 Battery Gauge Driver")
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>