[WATCHDOG] Clean-up includes

Use #include <linux/io.h> instead of <asm/io.h>
Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
Clean-up includes.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c
index 24e624c..1bafd7b 100644
--- a/drivers/watchdog/ixp4xx_wdt.c
+++ b/drivers/watchdog/ixp4xx_wdt.c
@@ -22,9 +22,9 @@
 #include <linux/watchdog.h>
 #include <linux/init.h>
 #include <linux/bitops.h>
+#include <linux/uaccess.h>
 
 #include <asm/hardware.h>
-#include <asm/uaccess.h>
 
 static int nowayout = WATCHDOG_NOWAYOUT;
 static int heartbeat = 60;	/* (secs) Default is 1 minute */