Add board MAINTAINERS files

We have switched to Kconfig and the boards.cfg file is going to
be removed. We have to retrieve the board status and maintainers
information from it.

The MAINTAINERS format as in Linux Kernel would be nice
because we can crib the scripts/get_maintainer.pl script.

After some discussion, we chose to put a MAINTAINERS file under each
board directory, not the top-level one because we want to collect
relevant information for a board into a single place.

TODO:
Modify get_maintainer.pl to scan multiple MAINTAINERS files.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Suggested-by: Tom Rini <trini@ti.com>
Acked-by: Simon Glass <sjg@chromium.org>

board/gaisler/gr_cpci_ax2000/MAINTAINERS

@@ -0,0 +1,6 @@
+GR_CPCI_AX2000 BOARD
+M:	-
+S:	Maintained
+F:	board/gaisler/gr_cpci_ax2000/
+F:	include/configs/gr_cpci_ax2000.h
+F:	configs/gr_cpci_ax2000_defconfig

board/gaisler/gr_ep2s60/MAINTAINERS

@@ -0,0 +1,6 @@
+GR_EP2S60 BOARD
+M:	-
+S:	Maintained
+F:	board/gaisler/gr_ep2s60/
+F:	include/configs/gr_ep2s60.h
+F:	configs/gr_ep2s60_defconfig

board/gaisler/gr_xc3s_1500/MAINTAINERS

@@ -0,0 +1,6 @@
+GR_XC3S_1500 BOARD
+M:	-
+S:	Maintained
+F:	board/gaisler/gr_xc3s_1500/
+F:	include/configs/gr_xc3s_1500.h
+F:	configs/gr_xc3s_1500_defconfig

board/gaisler/grsim/MAINTAINERS

@@ -0,0 +1,6 @@
+GRSIM BOARD
+M:	-
+S:	Maintained
+F:	board/gaisler/grsim/
+F:	include/configs/grsim.h
+F:	configs/grsim_defconfig

board/gaisler/grsim_leon2/MAINTAINERS

@@ -0,0 +1,6 @@
+GRSIM_LEON2 BOARD
+M:	-
+S:	Maintained
+F:	board/gaisler/grsim_leon2/
+F:	include/configs/grsim_leon2.h
+F:	configs/grsim_leon2_defconfig