net/i40e: fix build with 16B descriptor on Arm

net/i40e: fix build with 16B descriptor on Arm

For NEON vector path, there is an issue when building
with 16B descriptor:
incompatible types when assigning to type ‘uint64x2_t’
from type ‘uint32x4_t’
180 |  descs[3] = vbslq_u32(v_desc3_mask, v_zeros,
			vreinterpretq_u32_u64(descs[3]));
    |             ^~~~~~~~~

The fix is to add interpretation between type 'uint64x2_t'
and type 'uint32x4_t'.

Fixes: dba9e3bcd9bb ("net/i40e: add flow mark capability to NEON Rx")
Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Qi Zhang <qi.z.zhang@intel.com>