am335x, guardian: Add support for the bosch guardian board

Add support for the Bosch Guardian board.

CPU  : AM335X-GP rev 2.1
Model: Bosch AM335x Guardian
I2C:   ready
DRAM:  256 MiB
NAND:  512 MiB
MMC:   OMAP SD/MMC: 0

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Felix Brack <fb@ltec.ch>
diff --git a/board/bosch/guardian/MAINTAINERS b/board/bosch/guardian/MAINTAINERS
new file mode 100644
index 0000000..8d16ec0
--- /dev/null
+++ b/board/bosch/guardian/MAINTAINERS
@@ -0,0 +1,6 @@
+Guardian BOARD
+M:	Sjoerd Simons <sjoerd.simons@collabora.co.uk>
+S:	Maintained
+F:	board/bosch/guardian/
+F:	include/configs/am335x_guardian.h
+F:	configs/am335x_guardian_defconfig