MAINTAINERS: add maintainer entry for FREESCALE GPMI NAND driver

Add a maintainer entry for FREESCALE GPMI NAND driver and add myself as a
maintainer.

Signed-off-by: Han Xu <[email protected]>
Acked-by: Huang Shijie <[email protected]>
Signed-off-by: Brian Norris <[email protected]>

Author: hanxu-nxp

MAINTAINERS

@@ -4522,6 +4522,12 @@ L:	[email protected]
 S:	Maintained
 F:	drivers/dma/fsldma.*
 
+FREESCALE GPMI NAND DRIVER
+M:	Han Xu <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	drivers/mtd/nand/gpmi-nand/*
+
 FREESCALE I2C CPM DRIVER
 M:	Jochen Friedrich <[email protected]>
 L:	[email protected]