The reset value of Primary, Secondary and Subordinate bus numbers is
zero which is a broken setup.

Program a sensible default value for Primary/Secondary/Subordinate
bus numbers.
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: NMinghuan Lian <Minghuan.Lian@nxp.com>
Reviewed-by: NSubrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>