MAINTAINERS: add maintainer for the DPAA2 PTP clock driver

This patch is to add maintainer for the DPAA2 PTP clock driver.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -4395,6 +4395,12 @@ L:	linux-kernel@vger.kernel.org
 S:	Maintained
 F:	drivers/staging/fsl-dpaa2/ethsw
 
+DPAA2 PTP CLOCK DRIVER
+M:	Yangbo Lu <yangbo.lu@nxp.com>
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+F:	drivers/staging/fsl-dpaa2/rtc
+
 DPT_I2O SCSI RAID DRIVER
 M:	Adaptec OEM Raid Solutions <aacraid@microsemi.com>
 L:	linux-scsi@vger.kernel.org