watchdog: it8712f_wdt.c: improve includes

remove unneeded pci.h include.
and include ioport.h to avoid build errors for the region functions.
Reported-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

drivers/watchdog/it8712f_wdt.c

@@ -28,10 +28,10 @@
 #include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/fs.h>
-#include <linux/pci.h>
 #include <linux/spinlock.h>
 #include <linux/uaccess.h>
 #include <linux/io.h>
+#include <linux/ioport.h>
 
 #define NAME "it8712f_wdt"