MAINTAINERS: add additional file for MMCI driver

The MMCI driver has an additional file in include/linux/amba.  Include
this file in its maintainer entry.

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

MAINTAINERS

diff --git a/MAINTAINERS b/MAINTAINERS
index d2a7cd4..914e236 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -672,6 +672,7 @@
 ARM PRIMECELL MMCI PL180/1 DRIVER
 S:	Orphan
 F:	drivers/mmc/host/mmci.*
+F:	include/linux/amba/mmci.h
 
 ARM PRIMECELL UART PL010 AND PL011 DRIVERS
 M:	Russell King <linux@arm.linux.org.uk>