m68k: add board stmark2, mcf5441x based

Sysam stmark2 board is a generic and fully (hw and sw) open board, with
a mcf54415 Coldfire CPU, 128MB of DDR2, 16MB of SPI flash and SD card
as non volatile memories, and a wifi module included on-board.
The board is actually used mainly for Coldfire custodian testing activity
related to the mcf5441x Coldfire family.

For further information please see: http://sysam.it/cff_stmark2.html

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
---

Changes in v2:
 - remove CMD_REGINFO
 - add board information in commit message
diff --git a/board/sysam/stmark2/MAINTAINERS b/board/sysam/stmark2/MAINTAINERS
new file mode 100644
index 0000000..b87f432
--- /dev/null
+++ b/board/sysam/stmark2/MAINTAINERS
@@ -0,0 +1,6 @@
+STMARK2 BOARD
+M:	Angelo Dureghello <angelo@sysam.it>
+S:	Maintained
+F:	board/sysam/stmark2/
+F:	include/configs/stmark2.h
+F:	configs/stmark2_defconfig