net: ipa: remove duplicate include

Remove linux/notifier.h which is included more than once
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipa/ipa.h

@@ -10,7 +10,6 @@
 #include <linux/device.h>
 #include <linux/notifier.h>
 #include <linux/pm_wakeup.h>
-#include <linux/notifier.h>
 
 #include "ipa_version.h"
 #include "gsi.h"