Missing ARM/BCMRING MTD NAND DRIVER files?

[Joe Perches]

Commit 57a473f2f97cf3bca78df08aac2f438ddef03bee added
this MAINTAINERS entry, but not the files listed.

No other commit added these files either.

Are these files supposed to be part of kernel sources?
If not, I think the MAINTAINERS entry should be removed.

ARM/BCMRING MTD NAND DRIVER
M:	Leo Chen <leochen at broadcom.com>
M:	Scott Branden <sbranden at broadcom.com>
L:	linux-mtd at lists.infradead.org
S:	Maintained
F:	drivers/mtd/nand/bcm_umi_nand.c
F:	drivers/mtd/nand/bcm_umi_bch.c
F:	drivers/mtd/nand/bcm_umi_hamming.c
F:	drivers/mtd/nand/nand_bcm_umi.h