Update MAINTAINERS to add reviewer for CoreSight

Added myself as a designated reviewer for the CoreSight infrastructure
at the request of Mathieu Poirier.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200320165303.13681-13-mathieu.poirier@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -1676,6 +1676,7 @@ F:	arch/arm/mach-ep93xx/micro9.c
 ARM/CORESIGHT FRAMEWORK AND DRIVERS
 M:	Mathieu Poirier <mathieu.poirier@linaro.org>
 R:	Suzuki K Poulose <suzuki.poulose@arm.com>
+R:	Mike Leach <mike.leach@linaro.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	drivers/hwtracing/coresight/*