ieee802154: socket: fix checkpatch issue
ieee802154: socket: fix checkpatch issue

This patch solves the following checkpatch issue:

CHECK: Comparison to NULL could be written "skb"
+		if (skb != NULL) {

Signed-off-by: Alexander Aring <d03dbcdedb9639e397df9b8578e8fc8274f4e6c4@gmail.com>
Signed-off-by: Marcel Holtmann <44592b4eea36663c86b994bb0ea99d15309c1c7d@holtmann.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs