The code contained some places that used an additional argument for
setup_hw after -R and also contained places where setup_hw cmdline was
passed as a string instead of an argument list. It also contained places
where the ifname was only treated as a single interface and disregarded
the possiblity of multiple interfaces. This commit fixes these issues
and executes setup_hw from a single function for all cases.
Signed-off-by: Jonathan Afek <jonathanx.afek@intel.com>