devargs: use a comma to separate key/values for bsd
devargs: use a comma to separate key/values for bsd

The bsdapp part was missing in commit a8b97e3a1db0a9366d58811411b904e4fef8160f.

This commit changes the API of --use-device command line argument.
It changes the separators from ';' to ','.

Signed-off-by: Olivier Matz <dfcc1510895413197abb4336e39bb0a3906cba71@6wind.com>
Acked-by: Neil Horman <3316dc2d77df57653443c0391a5296176d6ca9c3@tuxdriver.com>

venkynv/dpdk-mirror,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,mixja/dpdk,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork,tsphillips/dpdk-fork,msune/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,msune/dpdk,mixja/dpdk,msune/dpdk,tsphillips/dpdk-fork,msune/dpdk,venkynv/dpdk-mirror,mixja/dpdk,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork