linux-phytec-ti

MAINTAINERS: Add Amit Kucheria as reviewer for thermal

Add Amit Kucheria as the reviewer for thermal as he would like to
participate in the review process effort for the thermal framework.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>