MAINTAINERS: add maintainer entry for AMBA serial drivers

Add the proper maintainer entry for the AMBA serial drivers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/MAINTAINERS b/MAINTAINERS
index 915564e..d2a7cd4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -673,6 +673,12 @@
 S:	Orphan
 F:	drivers/mmc/host/mmci.*
 
+ARM PRIMECELL UART PL010 AND PL011 DRIVERS
+M:	Russell King <linux@arm.linux.org.uk>
+S:	Maintained
+F:	drivers/tty/serial/amba-pl01*.c
+F:	include/linux/amba/serial.h
+
 ARM PRIMECELL BUS SUPPORT
 M:	Russell King <linux@arm.linux.org.uk>
 S:	Maintained