[MMC] Add maintainers entry for MMC subsystem

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

authored by Russell King and committed by Russell King baca2da4 672c6108

+5
+5
MAINTAINERS
··· 1877 1877 W: http://www.atnf.csiro.au/~rgooch/linux/kernel-patches.html 1878 1878 S: Maintained 1879 1879 1880 + MULTIMEDIA CARD SUBSYSTEM 1881 + P: Russell King 1882 + M: rmk+mmc@arm.linux.org.uk 1883 + S: Maintained 1884 + 1880 1885 MULTISOUND SOUND DRIVER 1881 1886 P: Andrew Veliath 1882 1887 M: andrewtv@usa.net