m68k: add amcore board support

Add Sysam Amcore m68k-based board support.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
diff --git a/board/sysam/amcore/MAINTAINERS b/board/sysam/amcore/MAINTAINERS
new file mode 100644
index 0000000..fe5dd9b
--- /dev/null
+++ b/board/sysam/amcore/MAINTAINERS
@@ -0,0 +1,6 @@
+AMCORE BOARD
+M:	Angelo Dureghello <angelo@sysam.it>
+S:	Maintained
+F:	board/sysam/amcore/
+F:	include/configs/amcore.h
+F:      configs/amcore_defconfig