kernel: update 4.4 kernel to 4.4.42

Refresh patches on all 4.4 supported platforms.
Compile & run tested: lantiq/xrx200

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/kernel/mac80211/patches/090-remove-cred.patch

@@ -0,0 +1,15 @@
+This is only needed for kernel < 2.6.29 and conflicts with kernel 4.4.42
+
+--- a/backport-include/linux/cred.h
++++ /dev/null
+@@ -1,10 +0,0 @@
+-#ifndef __BACKPORT_LINUX_CRED_H
+-#define __BACKPORT_LINUX_CRED_H
+-#include_next <linux/cred.h>
+-#include <linux/version.h>
+-
+-#ifndef current_user_ns
+-#define current_user_ns()	(current->nsproxy->user_ns)
+-#endif
+-
+-#endif /* __BACKPORT_LINUX_CRED_H */