net: mana: Remove unnecessary check of cqe_type in mana_process_rx_cqe()

The switch statement already ensures cqe_type == CQE_RX_OKAY at that
point.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>