MAINTAINERS: Add an entry for SPI NOR

Add myself as co-maintainer for U-Boot SPI NOR subsystem.
Signed-off-by: NVignesh R <vigneshr@ti.com>
Reviewed-by: NJagan Teki <jagan@openedev.com>
[jagan: drop mtd/spi file from SPI entry]
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>

MAINTAINERS

@@ -686,10 +686,18 @@ SPI
 M:	Jagan Teki <jagan@openedev.com>
 S:	Maintained
 T:	git git://git.denx.de/u-boot-spi.git
-F:	drivers/mtd/spi/
 F:	drivers/spi/
 F:	include/spi*
 
+SPI-NOR
+M:	Jagan Teki <jagan@openedev.com>
+M:	Vignesh R <vigneshr@ti.com>
+S:	Maintained
+F:	drivers/mtd/spi/
+F:	include/spi_flash.h
+F:	include/linux/mtd/cfi.h
+F:	include/linux/mtd/spi-nor.h
+
 SPMI
 M:	Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
 S:	Maintained