thermal/drivers/sun8i: Convert to use macro

Use TEMP_CALIB_MASK macro instead of raw number.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230123102319.37710-1-frank.li@vivo.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>