MAINTAINERS: Deal with '+' in paths

The listed paths are allowed to contain wildcards.  This includes the
'+' character which we have as a literal part of the path in a few
cases. Escape the '+' here so that files are matched.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/k+p/kp_imx53/MAINTAINERS b/board/k+p/kp_imx53/MAINTAINERS
index c105a93..daf8611 100644
--- a/board/k+p/kp_imx53/MAINTAINERS
+++ b/board/k+p/kp_imx53/MAINTAINERS
@@ -1,6 +1,7 @@
 KP_IMX53_HSC BOARD
 M:	Lukasz Majewski <lukma@denx.de>
 S:	Maintained
-F:	board/k+p/kp_imx53/
+F:	board/k\+p/kp_imx53/
+F:	board/k\+p/bootscripts/tpcboot.cmd
 F:	include/configs/kp_imx53.h
 F:	configs/kp_imx53_defconfig