watchdog: omap_wdt: Switch required include for watchdog defines

All of the required values for using the omap_wdt.c driver are found in
<asm/ti-common/omap_wdt.h> and this is what is indirectly pulled in via
<asm/arch/hardware.h> when it exists.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c
index ca2bc7c..f0e57b4 100644
--- a/drivers/watchdog/omap_wdt.c
+++ b/drivers/watchdog/omap_wdt.c
@@ -39,7 +39,7 @@
 #include <common.h>
 #include <log.h>
 #include <watchdog.h>
-#include <asm/arch/hardware.h>
+#include <asm/ti-common/omap_wdt.h>
 #include <asm/io.h>
 #include <asm/processor.h>
 #include <asm/arch/cpu.h>