MAINTAINERS: add mailing list for GPMI NAND driver

Add the [email protected] mailing list for the GPMI NAND driver.

Signed-off-by: Han Xu <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]

Author: hanxu-nxp

MAINTAINERS

@@ -9028,6 +9028,7 @@ F:	drivers/net/ethernet/freescale/gianfar*
 
 FREESCALE GPMI NAND DRIVER
 M:	Han Xu <[email protected]>
+L:	[email protected]
 L:	[email protected]
 S:	Maintained
 F:	drivers/mtd/nand/raw/gpmi-nand/*