net: remove two duplicated #include

Removed duplicated #include <rdma/ib_verbs.h> in net/9p/trans_rdma.c
		and  #include <linux/thread_info.h> in net/socket.c

Signed-off-by: Jianjun Kong <jianjun@zeuux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>