MAINTAINERS: CFI flash maintainership only includes the CFI related files

All the other files in drivers/mtd/* are not really CFI related. So lets
only include the files that are CFI specific.
Signed-off-by: NStefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Jagan Teki <jagannadh.teki@gmail.com>
Acked-by: NJagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Acked-by: NHeiko Schocher <hs@denx.de>

MAINTAINERS

@@ -192,7 +192,8 @@ CFI FLASH
 M:	Stefan Roese <sr@denx.de>
 S:	Maintained
 T:	git git://git.denx.de/u-boot-cfi-flash.git
-F:	drivers/mtd/*
+F:	drivers/mtd/cfi_flash.c
+F:	drivers/mtd/jedec_flash.c
 
 COLDFIRE
 M:	Jason Jin <jason.jin@freescale.com>