board: freescale: t102xrdb: Add MAINTAINER

Add "Priyanka Jain <priyanka.jain@nxp.com>" as
MAINTAINER for t102xrdb board.

Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>

board/freescale/t102xrdb/MAINTAINERS

 T102XRDB BOARD
-#M:	Shengzhou Liu  <Shengzhou.Liu@freescale.com>
-S:	Orphan (since 2018-05)
+M:	Priyanka Jain <priyanka.jain@nxp.com>
+S:	Maintained
 F:	board/freescale/t102xrdb/
 F:	include/configs/T102xRDB.h
 F:	configs/T1024RDB_defconfig