MAINTAINERS: add an entry for System Trace Module device class

Add myself as a maintainer for the stm class framework.
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -9109,6 +9109,14 @@ S:	Maintained
 F:	include/linux/mmc/dw_mmc.h
 F:	drivers/mmc/host/dw_mmc*
 
+SYSTEM TRACE MODULE CLASS
+M:	Alexander Shishkin <alexander.shishkin@linux.intel.com>
+S:	Maintained
+F:	Documentation/trace/stm.txt
+F:	drivers/hwtracing/stm/
+F:	include/linux/stm.h
+F:	include/uapi/linux/stm.h
+
 THUNDERBOLT DRIVER
 M:	Andreas Noever <andreas.noever@gmail.com>
 S:	Maintained