net/vdev_netvsc: fix build without C11 and pedantic
net/vdev_netvsc: fix build without C11 and pedantic

Remove CFLAGS -std=c11 and -pedantic in order to guarantee
a successful vdev_netvsc compilation on old Linux distributions.
Otherwise old GCC compilers may complain as follows:
cc1: error: unrecognized command line option -std=c11

Fixes: 6086ab3bb3d2 ("net/vdev_netvsc: introduce Hyper-V platform driver")

Signed-off-by: Ophir Munk <da2dc1f9ae64c8bd405ef0cf049405a44490d24e@mellanox.com>
Acked-by: Matan Azrad <6969f5f553ad7652679a585a85d7321babc90464@mellanox.com>

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