MAINTAINERS: Add Thermal subsystem co-maintainer

Adding myself as co-maintainer for the thermal subsystem.

The agreed work split will be so that as a co-maintainer
I will be taking care of platform thermal drivers, non-ACPI
thermal drivers and making sure the thermal framework core
code will continue to suffice the non-ACPI thermal needs.
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>
Acked-by: NZhang Rui <rui.zhang@intel.com>

MAINTAINERS

@@ -7898,6 +7898,7 @@ F:	arch/xtensa/
 
 THERMAL
 M:      Zhang Rui <rui.zhang@intel.com>
+M:      Eduardo Valentin <eduardo.valentin@ti.com>
 L:      linux-pm@vger.kernel.org
 T:      git git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux.git
 S:      Supported