Fixing CHECKED_RETURN issue by checking values returned
by rte_bbdev_dec_op_alloc_bulk and rte_bbdev_enc_op_alloc_bulk
functions.
Coverity issue: 279447, 279456
Fixes: f714a18885a6 ("app/testbbdev: add test application for bbdev")
Cc: stable@dpdk.org
Signed-off-by: Kamil Chalupnik <kamilx.chalupnik@intel.com>
Acked-by: Amr Mokhtar <amr.mokhtar@intel.com>