MAINTAINERS: serial:blackfin: update F: pattern

commit 0c6967b5a0 ("serial:blackfin: rename Blackfin serial driver to
bfin_uart.c") renamed the file, update the pattern.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 4308317..7510b63 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1487,7 +1487,7 @@
 L:	uclinux-dist-devel@blackfin.uclinux.org
 W:	http://blackfin.uclinux.org
 S:	Supported
-F:	drivers/tty/serial/bfin_5xx.c
+F:	drivers/tty/serial/bfin_uart.c
 
 BLACKFIN WATCHDOG DRIVER
 M:	Mike Frysinger <vapier.adi@gmail.com>