bus/dpaa: avoid big endian conversions for contextb
bus/dpaa: avoid big endian conversions for contextb

minor optimization in packet handling path

Signed-off-by: Nipun Gupta <4871fd67344c57328097f2fd932ad9a0f1f1fe74@nxp.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk