rdma: fix ipv4 checksum check in rdma-input node

rdma: fix ipv4 checksum check in rdma-input node

- cqe_flags pointer should be incremented accordingly otherwise only the
first element in cqe_flags will be updated
- flag l3_ok should be set for match variable when verifying if packets
are IPv4 packets with flag l3_ok set
- mask/match variables should be converted to network byte order to
match the endianness of cqe_flags
- vector processing of checking cqe flags will set return value to
0xFFFF by mistake if packet numbers are not multiple of 16(VEC256) or
8(VEC128)

Type: fix

Signed-off-by: Jieqiang Wang <jieqiang.wang@arm.com>
Change-Id: I9fec09e449fdffbb0ace8e5a6ccfeb6869b5cac1