ARM: at91: add at91sam9g20 and Calao USB A9G20 DT support

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Rob Herring <rob.herring@calxeda.com>
diff --git a/arch/arm/mach-at91/board-dt.c b/arch/arm/mach-at91/board-dt.c
index 33a0d8b..0b7d327 100644
--- a/arch/arm/mach-at91/board-dt.c
+++ b/arch/arm/mach-at91/board-dt.c
@@ -108,6 +108,7 @@
 
 static const char *at91_dt_board_compat[] __initdata = {
 	"atmel,at91sam9m10g45ek",
+	"calao,usb-a9g20",
 	NULL
 };