Devargs used in device iterator initialization wasn't set to zero, random
data like bus string lead to invalid address access.
This patch initializes devargs.
Bugzilla ID: 862
Fixes: c99a2d4c6b7f ("eal: implement device iteration initialization")
Cc: stable@dpdk.org
Signed-off-by: Xueming Li <xuemingl@nvidia.com>
fc382022c6