MAINTAINERS: Add co-maintainer for Qualcomm tsens thermal drivers

Add myself as the maintainer for Qualcomm tsens drivers so that I
can help Daniel by taking care of/reviewing changes to these drivers.

Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210319153711.2836652-1-thara.gopinath@linaro.org