MAINTAINERS: Correct minor mistakes on some file listings

There are a few entries where minor mistakes mean that we don't match up
with obviously expected files, correct those.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/broadcom/bcmns/MAINTAINERS b/board/broadcom/bcmns/MAINTAINERS
index fd37c33..86b68c9 100644
--- a/board/broadcom/bcmns/MAINTAINERS
+++ b/board/broadcom/bcmns/MAINTAINERS
@@ -2,5 +2,5 @@
 M:	Linus Walleij <linus.walleij@linaro.org>
 S:	Maintained
 F:	board/broadcom/bcmnsp/
-F:	configs/bcmnsp_defconfig
+F:	configs/bcmns_defconfig
 F:	include/configs/bcmnsp.h