Fix sparse warning:

drivers/thermal/tegra/tegra210-soctherm.c:211:33: warning:
 symbol 'tegra210_tsensor_thermtrips' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>