Move credit calculation to current_target()
and rename it to current_credit().
Acked-by: NIan Campbell <ian.campbell@citrix.com>
Acked-by: NDaniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: NDaniel Kiper <dkiper@net-space.pl>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>