arm, am335x: add watchdog support

Add TI OMAP 16xx & 24xx/34xx 32KHz (non-secure) watchdog support.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Tom Rini <trini@ti.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 7e255ce..3ade624 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -18,6 +18,7 @@
 COBJS-$(CONFIG_S5P)               += s5p_wdt.o
 COBJS-$(CONFIG_XILINX_TB_WATCHDOG) += xilinx_tb_wdt.o
 COBJS-$(CONFIG_BFIN_WATCHDOG)  += bfin_wdt.o
+COBJS-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)