MAINTAINERS: Add some missing directories or files

In a few cases we have MAINTAINERS entries that are missing obvious
paths or files. Typically this means a board directory that did not list
itself, but in a few cases we have a Kconfig file or similar.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/terasic/de1-soc/MAINTAINERS b/board/terasic/de1-soc/MAINTAINERS
index bd7a8d5..1e726e9 100644
--- a/board/terasic/de1-soc/MAINTAINERS
+++ b/board/terasic/de1-soc/MAINTAINERS
@@ -1,5 +1,6 @@
 DE1-SoC BOARD
 M:	Anatolij Gustschin <agust@denx.de>
 S:	Maintained
+F:	board/terasic/de1-soc/
 F:	include/configs/socfpga_de1_soc.h
 F:	configs/socfpga_de1_soc_defconfig