bsh: imx6ulz_smm_m2: Add imx6ulz BSH SMM M2 boards

Introduce BSH SystemMaster (SMM) M2 board family, which consists of:
imx6ulz SMM M2 and imx6ulz SMM M2 PRO boards.

Add support for imx6ulz BSH SMM M2 board:

- 128 MiB DDR3 RAM
- 256MiB Nand
- USBOTG1 peripheral - fastboot.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/board/bsh/imx6ulz_smm_m2/MAINTAINERS b/board/bsh/imx6ulz_smm_m2/MAINTAINERS
new file mode 100644
index 0000000..8f3d79d
--- /dev/null
+++ b/board/bsh/imx6ulz_smm_m2/MAINTAINERS
@@ -0,0 +1,6 @@
+MX6ULZ_SMM_M2 BOARD
+M:	Michael Trimarchi <michael@amarulasolutions.com>
+S:	Maintained
+F:	board/bsh/mx6ulz_smm_m2/
+F:	include/configs/imx6ulz_smm_m2.h
+F:	configs/imx6ulz_smm_m2_defconfig