xenvirt: fix build break on ethernet address parsing
xenvirt: fix build break on ethernet address parsing

Back in commit aaa662e75c23c61 ("cmdline: fix overflow on bsd"),
the author failed to fixup a call to cmdline_parse_etheraddr in xenvirt.
This patch makes the needed correction to avoid a build break.

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

phermansson/dpdk,phermansson/dpdk,phermansson/dpdk,phermansson/dpdk