MAINTAINERS: Add a number of "common" directories

A number of platforms have "common" directories that are in turn not
listed by the board MAINTAINERS file.  Add these directories in many
cases.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/keymile/pg-wcom-ls102xa/MAINTAINERS b/board/keymile/pg-wcom-ls102xa/MAINTAINERS
index 33db2b2..ed5baf2 100644
--- a/board/keymile/pg-wcom-ls102xa/MAINTAINERS
+++ b/board/keymile/pg-wcom-ls102xa/MAINTAINERS
@@ -3,6 +3,8 @@
 M:	Rainer Boschung <rainer.boschung@hitachienergy.com>
 S:	Maintained
 F:	board/keymile/pg-wcom-ls102xa/
+F:	board/keymile/common/
+F:	board/keymile/scripts/
 F:	include/configs/km/pg-wcom-ls102xa.h
 F:	include/configs/pg-wcom-seli8.h
 F:	include/configs/pg-wcom-expu1.h