MAINTAINERS: Add maintainer for HiSilicon PTT driver

Add maintainer for driver and documentation of HiSilicon PTT device.
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20220816114414.4092-6-yangyicong@huawei.comSigned-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

MAINTAINERS

@@ -9186,6 +9186,14 @@ S:	Supported
 F:	Documentation/admin-guide/perf/hns3-pmu.rst
 F:	drivers/perf/hisilicon/hns3_pmu.c
 
+HISILICON PTT DRIVER
+M:	Yicong Yang <yangyicong@hisilicon.com>
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+F:	Documentation/ABI/testing/sysfs-devices-hisi_ptt
+F:	Documentation/trace/hisi-ptt.rst
+F:	drivers/hwtracing/ptt/
+
 HISILICON QM DRIVER
 M:	Weili Qian <qianweili@huawei.com>
 M:	Zhou Wang <wangzhou1@hisilicon.com>